WO2017155843A1

WO2017155843A1 - Led lamp for producing biologically-adjusted light including a cyan led

Info

Publication number: WO2017155843A1
Application number: PCT/US2017/020852
Authority: WO
Inventors: Fredric Maxik; David Bartine; Eric Bretschneider
Original assignee: Biological Illumination, Llc
Priority date: 2016-03-11
Filing date: 2017-03-06
Publication date: 2017-09-14

Abstract

An LED lamp 100 may include a housing 115, a driver circuit 440 configured to electrically couple to a power source, and an LED package 200 that is electrically coupled to and driven by the driver circuit 440. The LED package 200 comprises a first LED configured to emit light having a peak intensity of about 450 nm, a second LED configured to emit light having a peak intensity within the range from 475 nm to 495 nm, and a color conversion material configured to perform a Stokes shift on light having a wavelength within the range from 440 nm to 460 nm.

Description

LED LAMP FOR PRODUCING BIOLOGICALLY-ADJUSTED

LIGHT INCLUDING A CYAN LED

Related Applications

|0ίί#1| This application Is a ( ?r lfiyaiiijn-sn-part and claims the benefit under 36 ^■U.S.& §120 of UvS. Patent Ap lcalSQR ¾iar Q. 14/514,010 fitted mrs&-Gh t W d LED Lamp for Producing Biologically-Adjusted Light filed October 14, 2014 (Attorney Docket No. 588.00069), which in turn is a continuation-in-part of U.S. Patent Appiication Serial No, Wl6S,i¾ now U.S. Patent Mo. 8,941,329 titled Tum LED Lamp for Pmd ing BMogiQaily-M jus d Light filed January 27, 2014 (Attorney Docket No, 588.00059), which is in turn a continuation of U.S. Patent Application Serial No. 13/311 ,300, now U.S. Patent No. 8,686,641 , titled Tunable LED Lamp for Producing Biologically-Adjusted Light filed December 5, 2011 (Attorney Docket No. 588.00013), the contents of each of which are incorporated in their entirety herein by reference except to the extent disclosure therein is inconsistent with disclosure herein.

Field of the Invention

[0002] The present invention relates to systems and methods of providing a lighting device to emit light configured to have various biological effects on an observer.

Background of the Invention

[0003] This background information is provided to reveal information believed by the applicant to be of possible relevance to the present invention. No admission is necessarily intended, nor should be construed, that any of the preceding information constitutes prior art against the present invention.

[0004] Melatonin is a hormone secreted at night by the pineal gland. Melatonin regulates sleep patterns and helps to maintain the body's circadian rhythm. The suppression of melatonin contributes to sleep disorders, disturbs the circadian rhythm, and may also contribute to conditions such as hypertension, heart disease, diabetes, and/or cancer. Blue light, and the blue light component of polychromatic light, have been sbowri to syppres the secretion of melatonin, Mor over, melatonin sippression has beer* showrt to be wavelength dependent, and peak at wavelengths between about 420nm and about 480nm. As such, individuals who suffer from sleep disorders, or circadian rhythm disruptions, continue to aggravate their conditions when using polychromatic light sources that have a blue light (420nm-480nm) component.

|QQ0$f Curve A of .Ft©. 1 iStastrates the action spectrum for melatonin suppression. As shown y Curve A_? a predicted maximum su ression Is experienced at wavelength around about 460nm. in other words, a light source having a spectral component between about 420nm and about 480nm is expected to cause melatonin suppression. FIG. 1 also illustrates the light spectra of conventional lig sourcss, Ourve , far example, shows tie light spectrum of an incandescent light source, evidenced by Curve 8, incandescent light sources cause low amounts of melatonin suppression because incandescent light sources lack a predominant blue component. Curve C, illustrating the light spectrum of a fluorescent light source, shows a predominant blue component. As such, fluorescent light sources are predicted to cause more melatonin suppression than incandescent light sources. Curve D, illustrating the light spectrum of a white light-emitting diode (LED) light source, shows a greater amount of blue component light than the fluorescent or incandescent light sources. As such, white LED light sources are predicted to cause more melatonin suppression than fluorescent or incandescent light sources.

[0006] As the once ubiquitous incandescent light bulb Is replaced b fluorescent light sources (e.g., compact-fluorescent light bu bs] and white LED light sources, more individuals may begin to suffer from sleep disorders, circadian rhythm disorders, and other biological system disruptions. One solution may be to simply filter out ail of the blue component (420nm-480nm) of a light source. However, such a simplistic approach would create a light source with unacceptable color rendering properties, and would negatively affect a user's photopic response.

Summary of the invention

[0007] With the foregoing in mind, embodiments of the present invention are related to light sources and, more specifically, to a light-emitting diode (LED) lamp for producing a biologically-adjusted light. [0008] Provided herein are embodiments of an LED iamp comprising a housing, a driver circuit configured to electricaliy couple to a power source, and an LED package that is electrically coupled to and driven by the driver circuit. The LED package may comprise a first LED configured to emit light having a peak intensity of about 450 nm, a second LED configured to emit light having a peak intensity within the range from 475 nm to 490 nm, and a color conversion material∞«fgurecf ta perform a Stokes shift on Sight having a wavelength within the range from 440 nm to 460 nrn. The light emitted: by t e LED lamp may be configured to suppress melatonin secretion in an observer.

[0009] In some embodiments, the LED lamp may not comprise, and may s ecifieali exeSucfe, an LED confgureci i® emit light havifig a waveferigth greater than 600 nm. urthe more, ie LED lamp may not comprise, and may speesfieaSiy exclude, a color conversion material configured to emit light having a wavelength greater than 600 nm.

[0010] In some embodiments, the LED package may consist of a first LED corifi§urscj to emit il t having: a peak Intensity of about 450 nm, a second LED configured to ©fnit Sight Saving a peak intensity witMn tne range from 475 nm to 490 nm, and a color conversion material configured to perform a Stokes shift on light having a wavelength within the range from 440 nm to 460 nm.

[0011] In some embodiments, the LED lamp may comprise a plurality of LED packages. Furthermore, the plurality of LED packages may consist of LED packages comprising a first LED configured to emit light having a peak intensity of about 450 nm, a second LED configured to emit light having a peak intensity within the range from 475 nm to 490 nm, and a color conversion material configured to perform a Stokes shift on light having a wavelength within the range from 440 nm to 460 nm. Additionally, the plurality of LED packages may consist of LED packages consisting of a first LED configured to emit light having a peak intensity of about 450 nm, a second LED configured to emit light having a peak intensity within the range from 475 nm to 490 nm, and a color conversion material configured to perform a Stokes shift on light having a wavelength within the range from 440 nm to 460 nm.

[0012] In some embodiments, light emitted by the LED lamp may have a CRI of at least 90. Additionally, light emitted by the LED lamp may have a CCT of less than 5000K. Furthermore, light emitted by the LED lamp may have an R9 value of at least 90. Additionally, light emitted by the LED lamp may have a CCT of less than 4000K.

[0013] In some embodiments, the color conversion material may be configured to emit light having a peak intensity within the range from 500 nm to 560 nm. The LED lamp may further comprise an optic carried by the housing and positioned in optical communication with the LED package. Furthermore, the housing may be configured to facilitate the attachment of the LED lamp to a troffer light fixture. In some embodiments, the housing itself may be a troffer fixture that may be installed in a ceiling, such as a drop ceiling.

[0014] In some embodiments, the LED lamp may further comprise an output select controller electrically coupled to the driver circuit to program the driver circuit to drive the LED package in one of a plurality of light output configurations, wherein the plurality of light output configurations includes a general lighting configuration and a phase-shift configuration. The light output in the phase-shift configuration may have a peak intensity within the range from 475 nm to 490 nm that is greater than a peak intensity within the range from 475 nm to 490 nm of the light output in the general lighting configuration

[0015] Various aspects and alternative embodiments are described below.

Brief Description of the Drawings

[0016] FIG. 1 illustrates the light spectra of conventional light sources in comparison to a predicted melatonin suppression action spectrum for polychromatic light.

[0017] FIG. 2 is a perspective view of an LED lamp in accordance with one embodiment presented herein.

[0018] FIG. 3 is an exploded view of the LED lamp of FIG. 2.

[0019] FIG. 4 is an exploded view of a portion of the LED lamp of FIG. 2.

[0020] F!G. 5 is an exploded view of a portion of the LED lamp of FIG. 2.

[0021] FIG. 6 is an exploded view of a portion of the LED lamp of F!G. 2.

[0022] F!G. 7 is an exploded view of a portion of the LED lamp of FIG. 2.

[0023] FIG. 8 is a schematic process diagram of an LED lamp in accordance with the present invention. [0024] FiG. 9 illustrates a relative radiant power curve for a mint LED die used in one embodiment presented herein.

[0025] FiGs 10A and 10B present color bin data for a mint LED die used Ml one embodiment presented herein.

[0026] FIG. 1 1 shows relative spectral power distributions for red, cyan, and blue LED dies that are used in one embodiment presented.

[0027] FIG. 12 shows a power spectral distribution of an LED lamp III a pre-sleep configuration, in accordance with another embodiment presented.

[0028] FIG. 13 shows a power spectral distribution of an LED lamp in a phase-shift

GGnfigursf on, I aeEor^aric© wilti one rl sdiment presented.

[O 20 FiG. 14 shows a ^"power spectral distribution of an LED lamp in a general lighting configuration, in accordance with one embodiment presented.

[0030] FiG. 15 is an exploded view of an LED lamp in accordance with another embodiment presented.

0i31| F!G. 16 shows an alternative power spectral distribution for an LED lamp in a pre-sleep eonfiuraiion .

[0032] FiG. 17 shows an alternative power spectral distribution for an LED lamp in a phase-shift configuration.

[0033] F!G. 18 shows an alternative power spectral distribution for an LED lamp in a gsoaraS lig ting eorifji ratlon.

|δ©3 | FIG, 19 shows a p wer spectral distribution of an LED lamp in accordance with one embodiment presented.

Petal! led Description of tl¾a Preferred Smbod m@ ¾t

|0S3S| Melatonin is a hofr orie secreted at flight y the pineal^■ gland, elatomn regulates sleep patterns and helps to maintain the body's circadian rhythm. The suppression of melatonin contributes to sleep disorders, disturbs the circadian rhythm, and may also contribute to conditions such as hypertension, heart disease, diabetes, and/or cancer. Blue light, and the blue iight component of polychromatic Iight, have been shown to suppress the secretion of melatonin. Moreover, melatonin suppression has been shown to be wavelength dependent, and peak at wavelengths between about 2CJ m and afeout 480 m. As such, individuals who suffer from sleep disorders, or cirea^i n fh^hm cj sfuplierts, conti ue to aggravate their conditions when using polychromatic fight sources that have a blue light (420nm-480nm) component.

[0036] Curve A of FIG. I illustrates the action spectrum for melatonin suppression. As shown by Curve A, a predicted maximum suppression is experienced at wavelengths around about 4e0nrft . In ther words, ¾hl source havtog a soectrai ctsmooneni oetweert aboat 4 Qnm and alsout: 4S§nm is expected to um melatonin suppression. FI . 1 also illustrates the Sight spectra of conventional light sources. Curve B, for example, shows the light spectrum of an incandescent light source. As evidenced by Curve B, incandescent light sources cause low amounts of melatonin su pressiQrs ecause sncancSesceni fight sources lack a predominant blue component. Curve C_(. iSlustratsn i the fight spectrum of a fluorescent light source, shows a predominant blue component. As such, fluorescent light sources are predicted to cause more melatonin suppression than incandescent light sources. Curve D, illustrating the light spectrum of a white light-emitting diode (LED) light source, shows a greater amount of blue component light than the fluorescent or incandescent light sources. As such, white LED light sources are predicted to cause more melatonin suppression than fluorescent or incandescent light sources.

[0037] As the once ubiquitous incandescent light bulb is replaced by fluorescent light sources (e.g., compact-fluorescent light bulbs) and white LED light sources, more individuals may begin to suffer from sleep disorders, circadian rhythm disorders, and other biological system disruptions. One solution may be to simply filter out ail of the blue component (420nm-480nm) of a light source. However, such a simplistic approach would create a light source with unacceptable color rendering properties, and would negatively affect a user's photopic response.

[0038] On the other hand, because exposure to light generally, and blue light in particular, can reduce the level of drowsiness by suppressing the secretion of melatonin, exposure to light can be employed to maintain alertness when needed. Additionally, exposure to enhanced the blue light intensities can help to reset, or shift, the phase of the circadian rhythm of an individual. As such, phase-shifting can be useful in a variety of situations when resetting an individual's internal body clock is desired. Examples include: avoiding jetlagged after inter-continental travel, or maintaining alertness for shift-workers who are engaged in nighttime work. Although varying the intensity of the blue spectral component of a light source can be achieved through simple filtering, such filtering results in a non-optimal lighting environment.

[0039] As such, presenting herein is an -^'LED lamp with cemm rcla!ly^■ acceptable color rendering properties, which can be tuned^" to produce v rying igft outputs. In one embodiment, the light output produces minimal melatonin suppression, and thus has a minimal effect on natural sleep patterns and other biological systems. The LED lamp may also be tuned to generate different levels of blue light, appropriate for the given circumstance, while maintaining good light quality and a high CRi in each case. The LED lamp may also be configured to "self-tune" itself to generate the appropriate light output spectrum, depending on factors such as the lamp's location, use, ambient environment, etc.

[0040] The light output states/config u rations achievable by the LED lamps presented include: a pre-sleep configuration, a phase-shift configuration, and a general lighting configuration. In the pre-sleep configuration, the lamp generates a reduceif level of blue light in order to provide an adequate ording: envirortment white sl§nifenify lessening the suppression of melatonin. The spectrum of light produced by the lamp in the pre-sleep configuration provides an environment appropriate for preparing for sleep while still maintaining light quality. In the phase-shifting configuration, the lamp generates an increased level of blue light, thereby greatly diminishing melatonin production. The spectrum of light produced by the lamp in this phase-shifting configuration provides an environment for shifting the phase of an individual's circadian rhythm or internal body clock. In the general lighting configuration, the lamp generates a normal level blue light, consistent with a typical light spectrum (e.g., daylight), in all states, however, the lamp maintains high visual qualities and CRI, in order to provide an adequate working environment.

[0041] In one embodiment, the ability to tune, or adjust, the light output is provided by employing a specific combination of LED dies of different colors, and driving the LED dies at various currents to achieve the desired light output. In one embodiment, the LED iamp employs a combination of red, blue, cyan, and mint LED dies, such that the combination of dies produces a desired light output, while maintaining high quality light and high CRI.

[0042] The following detailed description of the figures refers to the accompanying drawings that illustrate an exemplary embodiment of a tunable LED lamp for producing a biologically-adjusted light output. Other embodiments are possible. Modifications may be made to the embodiment described herein without departing from the spirit and scope of the present invention. Therefore, the following detailed description is not meant to be limiting.

[0043] FIG. 2 is a perspective view of an LED lamp (or bulb) 100 in accordance with one embodiment presented herein. In general, LED lamp 00 is appropriately designed to produce biologically-adjusted light, while still maintaining a commercially acceptable color temperature and commercially acceptable color rending properties.

[0044] The term "biologically-adjusted light" is intended to mean "a light that has been modified to manage biological effects on a user." The term "biological effects" is intended to mean "any impact or change a Sight source has to a naturally occurring function or process." Biological effects, for example, may include hormone secretion or suppression (e.g., melatonin suppression), changes to cellular function, stimulation or disruption of natural processes, cellular mutations or manipulations, etc.

[0045] As shown in FIG. 2, LED lamp 100 includes a base 110, a heat sink 120, and an optic 130. As will be described below, LED lamp 100 further includes one or more LED chips and dedicated circuitry

[0046] Base 110 is preferably an Edison-type screw-in shell. Base 110 is preferably formed of an electrically conductive material such as aluminum. In alternative embodiments, base 1 10 may be formed of other electrically conductive materials such as silver, copper, gold, conductive alloys, etc. Internal electrical leads (not shown) are attached to base 110 to serve as contacts for a standard light socket (not shown). Additionally, base 1 10 may be adapted to be any type of lamp base known in the art, including, but not limited to, bayonet, bi-post, bi-pin and wedge bases.

i&Q 7J As fcnown in the art, the durability of an LED chip is usually affected by temperature. As socli, heal sink 120, and structures equivalent thereto, serves as means for dissipating heat away from one or more of the LED chips within LED lamp 100. In FIG. 2, heat sink 120 includes fins to increase the surface area of the heat sink. Merrtstlve!y, heat sink 120 may be formed of any conf g ration _s m, w s ta e, it¾ the general intention of drawings heat away from the LED chips within LED lamp 100. Heat sink 120 is preferably formed of a thermally conductive material such as aluminum, copper, steel, etc.

[0048] Optic 130 is provided to surround th LED Chips within LED lamp 100. As used herein, the terms "surround" or "surroun Rg" are intended to mean partially or ftiy encapsulating. In other words, optic 130 surrounds the LED chips by partially or fufiy covering one or more LED chips such that Sight produced by one or more LED chips is transmitted throug optic 30, !n the emhodimer shewn, optic 130 takes a globular shape. Optic 130, owever, may be formed of alternative forms, shapes, or sizes. In one embodiment, optic 130 serves as an optic diffusing element by incorporating diffusing technology, such as described in U.S. Patent No. 7,319,293 (which is incorporated herein by reference in its entirety), in such an embodiment, optic 130, and structures equivalent thereto, serves as means for defcsihi light from the LED chips, in alternative embodiments, optfe 130 may be formed of a light diffusive plastic, may include a light diffusive coating, or may having diffusive particles attached or embedded therein.

[0049] In one embodiment, optic 130 includes a color filter applied thereto. The color filter may be on the interior or exterior surface of optic 130. The color filter is used to modify if e light output from one or more of the LED chips. In one embodiment, the color flier is ¾ROSOOLU i i3 CALCPLOR 30 YELLOW. In alternative embodiments, the color filter may be configured to have a total transmission of about 75%, a thickness of about 50 microns, and/or may be formed of a deep-dyed polyester film on a polyethylene terephthalate (PET) substrate.

[0050] In yet another embodiment, the coior filter may be configured to have transmission percentages within +/-10%, at one or more wavelengths, in accordance with the following table:

JOOSfJ FiG. 3 m m exploded vie of LED lamp 100, iustratsng internal com onents of tie lamp. FIGS. 4-7 are ex loded iews of port!e s of LED lamp 100. FIGS. 3-7 also serve to illustrate how to assemble LED lamp 100. As shown, in addition to the components described above, LED lamp 100 aiso includes at least a housing 115, a printed circuit board (PCB) 117, one or more LED chips 200, a holder 125, spring wire connectors 127, and screws 129.

[0052] As described in more detail with reference to FiG. 8, PCB 1 17 includes dedicated circuitry, such as power supply 450, driver circuit 440, and output-select controller 445. The circuitry on PCB 117 and equivalents thereof serves as a means for driving the LED chips 200 (or individual LED dies) to produce a biologically-adjusted light output.

[0053] As used herein, the term "LED chip(s)" is meant to broadly include LED die(s), with or without packaging and reflectors, that may or may not be treated (e.g., with applied phosphors). In the embodiment shown, however, each LED chip 200 includes a plurality of LED diss, in om embodirl eiit, LED chips 200 include an LED package eomprisi g: a plurality of LED dies, with: at least two differeril colors, driven at varying currents to produce the desired light output and spectral power densities. Preferably, each LED chip 200 includes two red LED dies, three cyan LED dies, four mint LED dies, and three blue LED dies. FIG. 9 illustrates a relative radiant power curve for a mint LED die used in one embodiment presented herein. FIGS. 10A and 10B present color bin data for a mint LED die used in one embodiment presented herein. FiG. 11 shows relative spectral power distributions for red (or alternatively red-orange), cyan, and (two alternative) blue LED dies that are used in one embodiment presented (with alternative equivalent LED dies also being within the scope of the present invention). With this unique combinations of dies, together with the means for driving the LED chips, each of the above mentioned bio-effective states/configurations (e.g., pre-sleep, phase-shifting, and/or general lighting) can be obtained with good color rendering properties.

[0054] In one embodiment the tunable LED lamp operates in the pre-sleep configuration such that the radiant power emitted by the dies is in a ratio of: about 1 watt of radiant power generated by the mint LED dies, to about 0.5 watts of radiant power generated by the red-orange LED dies, to about 0.1 watts of radiant power generated by the cyan LED dies. In this embodiment the tunable LED Sarnp operates In tf e general Sighting configuration such that the radiant po er emitteil by the dies is in a ratio about 1 watt of radiant power generated by the mint LED dies, to about 0.3 watts of radiant power generated by the red-orange LED dies, to about 0.4 watts of radiant power generated by the cyan LED dies, to about 0.2 watts of radiant power generated by the biue LED dies. In this embodiment, the tunable LED lamp operates in the phase-shift configuration such that the radiant power emitted by the dies is in a ratio of about 1 watt of radiant power generated by the mint LED dies, to about 0.1 watts of radiant power generated by the red-orange LED dies, to about .2 watts of radiant power generated by the cyan LED dies, to about 0.4 watts of radiant power generated by the biue LED dies.

[0055] In another embodiment, the tunable LED lamp operates in the pre-sleep configuration such that the radiant power emitted by the dies is in a ratio of: about 1 watt of radiant power generated by the mint LED dies, to about 0.8 watts of radiant power generated by the red-orange LED dies, to about 0.3 watts of radiant power generated by the cyan LED dies. In this embodiment, the funabie LED lamp o erates in tie general lighting configuration such that the radiant power emitted by trie tiles is in a ratta about 1 watt of radiant power generated by the mint LED dies, to about 0.2 watts of radiant power generated by the red-orange LED dies, to about 0.2 watts of radiant power generated by the blue LED dies. In this embodiment, the tunable LED lamp operates in the phase-shift configuration suc - t at the radiant powef emitted by the dies is in a ratio of about 1 watt of radiant power generateci fey the m nt LED dies, to about 0.1 watts of watts of radiant power generated by the red-orange LED dies, to about 0.5 watts of radiant power generated by the blue LED dies.

[0056] For example, to achieve a pre-sleep configuration, driver circuit 440 may be configured to drive the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about 380nm and about 485nm, is less than about 10% of a relative spectra! power of any other peaks in the visible spectral output above about 485nm. In one embodiment, driver circuit 440 drives the plurality of LED dies such that about l&GmA of current is delivered to four mint LED dies; about 360mA of current is delivered to m red LED dies;: and about 40mA of current is delivered to three cyan LED dies. In another embodiment, wherein a color filter as described above is em loyee!, the p¾-8fe©p ocsrifi ratiorj is achieved by configuring driver circuit 440 to deiSMSf about SWMk of current to mint LED dies.

[0057] To achieve a phase-shift configuration, driver circuit 440 may be configured to drive the plurality of LED dies such that a blue output intensity levei, in a visible spectral output range of between about 455nm and about 485nm, is greater than about 125% (or greater than about 150%; or greater than about 200%} of a relative soeeSfal power of any other peaks in the visible spectral output above abaut 4$inm. The color ren ng index in the phase-shift configuration may be greater than 80. in one embodiment, driver circuit 440 drives the plurality of LED dies such that about 510mA of current is delivered to the mint LED dies; about 180mA of current is delivered to the red LED dies; about 40mA of current is delivered to the cyan LED dies; and about 100mA of current is delivered to the blue LED dies.

[0058] To achieve a general lighting configuration, driver circuit 440 may be configured to drive the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about S Onm ancl atjout 48Sr*m, is iween about 100% to about 20% of a relative spectra! power of any other peajis In the visible spectral output above about 485nm. The color rendering index in the general lighting configuration may be greater than 85. in one embodiment, driver circuit 440 drives the plurality of LED dies such that about 450mA of current is delivered to the mint LED dies; about 230mA of current is delivered to the red LED dies; about 1 10mA of current is deiivered to the cyan LED dies; and about 60mA of current is delivered to the blue LED dies.

[0059] In one embodiment, driver circuit 440 is configured to drive LED chips 200 with a ripple current at frequencies greater than 200Hz. A ripple current at frequencies above 200Hz is chosen to avoid biological effects that may be caused by ripple currents at frequencies below 200Hz. For example, studies have shown that some individuals are sensitive to light flicker below 200Hz, and in some instances experience aggravated headaches, seizures, etc.

& Ι As shown in F¾3, 4, fcase 110 Is glyscl or erirn sd onto housing 115. PC 117 is mo nted within: housing 15, insulation artd/or potting compound (not shown| may be used to secure POB 117 within housing 115. E!ectricai leads on PCB 117 are coupled to base 110 to form the elecMeal input leads of LED lamp 100.

[0061] In some embodiments, base 110 may be adapted to facilitate the operation of the LED lamp based upon receiving an electrical signal from a light socket that base 1 10 may be attached to. For example, base 110 may be adapted to receive electrical signals from the socket of a three-way Samp, as is known i n the art. Furthermore, driver circuit 440 may similarly be adapted to receive electric^ signals torn base 11 m such a fashion so as to use the electrical signals from the three-way lamp as an Indication of which emitting configuration is to be emitted. The modes of operation of a three-way !arnp are kno n: inllie art. Base fid and driver circuit 440 may be adapted to cause the emission of the phase-shift configuration upon receiving a first electrical signal from the socket of a three-way lamp, the general illumination configuration upon receiving a second electrical signal from the three-way lamp, and the pre-sleep configuration upon receiving a third electrical signal from the three-way lamp.

|0iS2| S¾0f¾ specifically, as is known m the art, fease 110 may include a firs terminal (not shown) and a second terminal .(not shown}, the first terminal being configured to electrically couple to a low-wattage contact of a three-way fixture, and the second terminal being configured to electrically couple to a medium-wattage contact of a three-way fixture. Driver circuit 440 may be positioned in electrical communication with each of the first and second terminals of base 110. When base 110 receives an electric signal at the first terminal, but not at the second terminal, the driver circuit 440 may detect such and may cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration. When base 1 10 receives an electrical signal at the second terminal, but not at the first terminal, the driver circuit 440 may detect such and may cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration, but not the same configuration as when an electrical signal was detected at the first terminal and not the second. Finally, base 110 receives an electrical signal at both the first terminal and the second terminal, driver circuit 440 may detect such and may cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration, but not the same c^n gufaScsn as is emitted when an eiectrica! signal is detected at only one of the first or seco terminals of fease 110,

[0063] Furthermore, in some embodiments, the driver circuit 440 may be configured to cause the emission of light according to any of the configurations as described hereinabove based upon the waveform of an electrical signal received by base 1 0 and detected tsy driver circuit 4 0, For example, in some embodiments, driver circuit 440 may fo configured: to cause the emission of light that is responsive to a TRIAC signal. A TRiAC signai is a method of manipuiating the waveform of an AC signal that selectively "chops" the waveform such that only certain periods of the waveform within an angular range are transmitted to an eieciriea! device, and is used in lighting.

[0Q§4 Driver circuit 440 ma be conigured to cause the emission of light according to one of the various configurations of light responsive to varying ranges of TRIAC signals. A range of a TRIAC signal may be considered as a portion of a continuous, unaltered AC signal. A first TRIAG signal range may be a range from greater than about 0% to about 33% of an AC signal. This range may correspond to a percentage of the total angular measurement of a single cycle of the AC signal. Accordingly, where the single cycle of the AC signal is approximately 2π radians, the first range may be from greater than about 0 to about .67π radians, it is contemplated that angular measurement of the TRiAC signal is only one method of defining a range of a characteristic of the TRiAC signal. Other characteristics include, but are not limited to, phase angle _s voltage, HM voltage, and any other characteristic of an eiectric signal. AcijQfdlrigiy, the driver circuit 440 may inc!ude circuitry necessary to determine any of the phase angle, voltage, and RMS voltage of a received signal. The driver circuit 440 may be configured to detect the TRiAC signal and determine it falls within this range, and may further be configured to cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration. A second TRiAC signal range may be from about 33% to about 67% of an AC signal, which may correspond to a range from about ,67π to about 1 ,33π radians. The driver circuit 440 may be configured to detect the TRIAC signal and determine it falls within this range, and may further be configured to cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration, but not the configuration that was emitted when the driver circuit determined the TRIAC sign l was within t e first TRIAC signal range. A third TR!AC signal range ma be frorri about 8711 to abeof 100% of an AC signal, which may correspond to a range from about 1.33rr to about 2π radians. The driver circuit 440 may be configured to detect the TRiAC signal and determine it falls within this range, and may further be configured to cause the emission of light according to one of the phase-shift configuration, the general luriiinatioh configuration, and the re- sleep configuration, but not the configuration that was emitted when the nver circuit determined the TRIAC signal was within either of the first TRiAC signal range or the second TRIAC signal range.

65] In another embodiment, a first TRIAC signal range may be from about 0% to about of an &- ^gn^^rpes miiiinig to within a range from about 0 to about 0.5π radians. Driver circuit 440 may be configured to detect the TRIAC signal and determine if it falls within this range, and may further be configured to not emit light. A second TRIAC signal range may be from about 25% to about 50% of an AC signal, corresponding to within a range frorriai>out Ο.δττ Is abeot 1.0π radians, Dwerefe configured to detect the TRiAiD signal and cieterrn!ne if 1 fals within this range, arid may fyrt er be configured to cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration. A third TRIAC signal range may be from about 50% to about 75% of an AC signal, corresponding to within range 1mm about L0†r to about 1 Sir radians. Driver elrstiit 440 may e configured t detect the TRIAC signal and determine If I fails within this range, and may further be configured to cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration, but not the configuration that was emitted when the driver circuit determined the TR!AC signal was within the second TRIAC signal range. A fourth TRIAC signal range may be from about 75% to about 100% of an AC signal, corresponding to a range from about 1.5π to about 2.0 radians. Driver circuit 440 may be configured to detect the TRiAC signal and determine if it falls within this range, and may further be configured to cause the emission of light according to one of the phase-shift configuration, the general illumination configuration, and the pre-sleep configuration, but not the configuration that was emitted when the driver circuit determined the TRiAC signal was within either of the second or third TRiAC signal ranges.

[0066] In order to enable the operation of an LED lamp 100 that is responsive to an electrical signal, such as a wireless signal or a TRIAC signal, it may be necessary to configure the power source for the LED lamp 100 to provide an electrical signal so as to control the operation of the LED lamp 100. Aeoorcl rigl¾ in some era&Oi3imgnis, ere the LED lamp 100 is electrically coupled to a lght$n§ fixture thai Is controlled by a wall switch, or where the LED lamp 100 is directly electrically connected to a wall switch, the invention may further comprise a retrofit wall-mounted switch (not shown). In such embodiments, the retrofit wall-mounted switch may operate substantially as the output selection device and the user input device described herein. The retrofit wall-mounted switch may be configured to replace a standard wall switch for control of a light fixture, as is known in the art. The retrofit wall-mounted switch may be configured to generate or manipulate a signal so as to control the operation of the LED lamp 100. For example, in some emijodirhef ts, trie mtr fit wail-fiioiiriied swttcft may be eonfifured; to generat a wireless signal that ma fee received by tie LED lamp 100 that may resu^ n the operation of the LED lamp 100 as described hereinabove. Also, in some embodiments, the retrofit wail-mounted switch may be configured to manipulate a power source to which the retrofit wall-mounted switch is electrically coupled so as to generate a TRIAC signal, to which l e LEO l m 100 may ope ate responsively to as described hereinabove. In such embodiments, toe retrofit wall-mouf tecS switch may be positioned electrically intermediate the power source and the LED lamp 100.

[0067] In some embodiments, base 110 may be configured to be a removably attachable member of LED lamp 100, defined as an intermediate base. In some other embodiments, an intermediate base may be included in addition the base 110. Intermediate base 110 may include structural elements and features facilitating the attachment of intermediate base 110 to a part of LED lamp 100. For example, intermediate base 110 may be adapted to cooperate with a feature or structure of housing 115 so as to removably attach intermediate base 110 thereto. For example, where intermediate base 1 10 is an Edison-type base having threading adapted to conform to standard threading for such bases, housing 1 15 may include a threaded section (not showri) configured to e tgag© with tha threads of intermediate base 110 so as to f¾rriO¥abie attach with intermediate l?ase 110. Furthermore, each of intermediate base 110 and LED lamp 100 may include electrical contacts so as to electrically couple LED lamp 100 to intermediate base 110 when intermediate base 110 is attached. The size, position, and configuration of such electrical contacts may vary according to the method of attaG ment between: LED lam 100 and intermediate base 110.

[006§3 Additionally, intermediate isase 10 may include elements facilitating the transitioning of LED chips 200 between the various configurations, i.e. pre-sleep, phase shift, and general illuminating configurations. For example, in some embodiments, intermediate base 110 may include a user input device (not shown) adapted to receive an in put from a user. The input from the user may cause intermediate base 110 to interact with at least one of driver circuit 440 and a power circuit of the LED iamp 100 so as to cause the LED chips 200 to emit light according to any of the configurations recited herein.

[0069] In some embodiments, the user input may cause the LED lamp 100 to transition from the present emitting configuration to a selected emitting configuration, or to cease emitting light. In some embodiments, the user input may cause the LED lamp 100 to progress from one emitting configuration to another emitting configuration according to a defined progression. An example of such a progression may be, from an initial state of not emitting light, to emitting the phase-shift configuration, to emitting the general illumination configuration, to emitting the pre-sleep configuration, to ceasing illumination. Such a progression is exemplary only, and any combination and permutation of the various emitting configurations are contemplated and included within the scope of the invention. The base 1 10 may include circuitry necessary to receive the input from the user and to communicate electrically with the various elements of the LED lamp 100 to achieve such function.

[0070] In some embodiments, the user input device may be a device that is physically accessible by a user when the base 110 is attached to the LED lamp 100 and when the LED lamp 100 is installed in a lighting fixture. For example, the user input device may be a lamp turn knob operatively connected to circuitry comprised by the base 1 10 to affect the transitioning described hereinabove. A lamp turn knob is an exemplary embodiment only, and any other structure or device capable of receiving an input from a user based on electrical and/or mechanical manipulation or operation by the user is contemplated and included within the scope of the invention. In some embodiments, the user input device may be an electronic communication device including a wireless communication device configured to receive a wireless signal from the user as the input. Such user input devices may be adapted to receive a user input in the form of an infrared signal, a visible light communication (VLC) signal, radio Signal, suc as Wi-Fi, itye oGth, Zigbee, ce!lu!ar data signals. Near Fieid Commufiicatte pG signai, a d any other wireless communication standard or method known in the art. Additionally, in some embodiments, the user input device may be adapted to receive an electronic signal from tr e user via a ired connexi n, ihciudirig:_f but not limited to, Ethernet, universal serial bus US ), and the like, Furttwniore, where the user input device is adapted to establish an Ethernet connection, the user input device may be adapted to receive power from the Ethernet connection, conforming to Power-over-Ethemet (PoE) standards. In such embodiments, the power received by the user input device may provide power to the LED lamp 100 enabling its operation.

[0071] In some embodiments, it is contemplated that any of the lighting devices as described herein may be integrally formed with a lighting fixture, where the LED lamp 100 is not removably attachable to the lighting fixture. More specifically, in some embodiments, those aspects of the lighting devices described herein that are included to permit the attachability of the lighting device to a separately-produced lighting fixture may be excluded, and those aspects directed to the function of emitting light according to the various lighting configurations as described herein may be included. For example, in the present embodiment, the base 1 10 may be excluded, and the driver circuit 440 may be directly electrically coupled to an external power source or to an electrical conduit thereto. Furthermore, the geometric configuration of optic 130, heat sink 120, LED chips 200, and all other elements of the LED lamp 100 may be adapted to facilitate a desired configuration of an integrally-formed lighting fixture.

[0072] As shown in FIG. 5, heat sink 120 is disposed about housing 115. As shown sn FIG. , Imo LEO chips 2QQ ar mounted onto a su po t surface for directly heat sink 120), and maintained in place fe holder 12S Whil two LED chips 200 are shown, alternative embodiments may inciude any number of LED chips (i.e., one or more), or any number of LED die inclvKluaiiy mounted Screws 129 are used to secure solder 12δ ΐο eat sink 120. Screws 129 raa be any screws known m itie art. Sp ing wire connectors 127 are used to connect LED chips 200 to the driver circuit 440 on PCB 117. in an alternative embodiment, LED chips 200 (with or without packaging) may be attached directiy to heat sink 120 without the use of holder 125, screws 129, or connectors 127. As shown in FiG. 7, optic 130 is then mounted on and attached to heat sink 120.

[0073] FiG. 8 is a schematic process diagram of an LED iamp in accordance with the present invention. FIG. 8 aiso serves a depiction of the functional components mounted on PCB 117, or otherwise associated with LED lamp 100. In practice, a power supply 4S0 Is used to provkie power to d iver circuit 440. Fpwer supply 4S0 may, for example, eenvert A€ power to DO pcwer,_: for driving the LED dies. Driver circuit 44D receives power input from power supply 450, and directional input from output-select control !er 445. in turn, driver circuit 440 provides the appropriate current suppiy to drive the LED dies in accordance with the desired spectral output. Controller 445 therefore serves to control the driving of LEDs 200, and may control light output based on factors such as: time of day, ambient light, real time input, temperature, optical output, location of lamp, etc.

[0074] Variations in temperature during operation can cause a spectral shift of individual dies. In an embodiment, a photo-sensor 860 is included to monitor the light output of the LEDs 200 to insure consistency and uniformity. Monitoring the output of LEDs 200 allows for real time feedback and control of each die to maintain the desired output spectrum. Photo-sensor 860 may also be used to identify the ambient light conditions. Photo-sensor 860 thus provides an input to controller 445.

[0075] In another embodiment, a thermal sensor 855 is used to measure the temperature of the LED dies and/or board supporting the LED dies. Because the light output of the dies is a known function of temperature, the measured temperature can be used to determine the light output of each die. Thermal sensor 855 may aiso be used to measure the ambient temperature conditions. Thermal sensor 855 thus provides another input to controller 445.

[0076] In another embodiment, a GPS chip 870 and/or clock 875 is included and interfaced with controller 445. Because iamps are shipped around the world to their end location, the ability to determine the expected/actual ambient light, daily light cycle, and seasonal light cycle variations is important in any lamp that may generate light to stimulate or alter circadian rhythms. GPS chip 870 and/or clock 875 provide inputs into controller 445 such that the time of day, seasonality, and other factors can be taken into account by controller 445 to control the lamp output accordingly. For example, by knowing the time of day based on location, the pre-sleep spectrum of the lamp can be generated during the later hours of the day.

[0077] In still another embodiment, a user-interface 865 is provided to allow a user to select the desired configuration. User-interface 865 may be in the form of a knob, switch:, digits! input, or equivalent means. As such, user-interface 865 provides an additional Input to control er 445.

[0078] In one embodiment, the pre-sleep configuration spectrum includes a portion of the spectrum that is reduced (e.g., notched/troughed) in intensity. This trough is centered at about 470nm (or alternatively between about 470-480nm, between about 46Q-4B0f*fii, oetwgett about 4?eH90nm_i or beiweeri about 46£N90nrn). S fa wavelength ranges may b the most important contributor to, and most effectwe a suppressing melatonin. Thus minimizing exposure in such wavelength bands during pre- sleep phase will be efficacious, !n one embodiment, the notching of the pre-sleep spectrum is obtained using a phosphor-coated mint LED having a specific output spectrum to accomplish the notch in the pre-sleep spectrum. The mint LED itself may include a notch/trough with a minimum in the 47G-480nm (or 460-490 nm range), and may be characterized by a maximum intensity in these wavelength ranges as a fractional percent of the peak intensity of the mint LED (e.g., the maximum of 470-480 emission is less than about 2.5% of the peak intensity; the max between about 460-490nm is less than about 5% of the peak intensity).

[0079] With reference again to FIG. 9, illustrated is a relative radiant power curve for a mint LED die used in one embodiment presented. As used herein, the terms "mint LED" or "mint LED die" or "mint die" should be construed to include any LED source, LED chip, LED die (with or without photo-con version material on tio tie)* any e uivalent light source that is configured or capable of producing the relative radiant power mm® shown in FIG. 9, or a relative radiant power curve equivalent thereto. Of particular interest to Wm ^mm & r^^ power curve is the ^ spectral "n«^ abo t 60-

490ηπ¾ and more specifically tsetween ai apout 4?0- ®0rtm. Said spectral notch provides a relative intensity, with respect to the peak intensity, that aliows the combination of LED dies (or equivalent light sources) to achieve their desired results (i.e., the desired output configuration). In one embodiment, the maximum intensity of the mint LED between about 46Q-490rim Is less fian about IS¾ of the intensity, in alternative e odiments the maximum Intensity of the mint LED bet en about 46049Dnm is less inan aUout or about 10%, or about 15%, or about 20% of the peak intensity. Further, in one embodiment, the maximum intensity of the mint LED between about 470-480nm is less than about 2.5% of the peak intensity. In altefiiattve embodiments,

of the mint LED between about 470-480nm is jess tban about 3.5%, 6%, 10%, or 20% of the peak intensity.

[0080] Figures 12, 13, and 14 show the power spectral distributions corresponding respectively to the pre-sleep, phase-shift, and general illumination configurations of the LED lamp in accordance with one embodiment of the ^ in sntior - The LED lamp in this embodiment comprises an LED board with a ratio of Cyan, Pint, Red, and Royal Sine dies of 3:3:2:1 respectively. The spectral output of the lamp according to each configuration is adjusted by generating radiant fluxes from multiple dies as described below.

[0081] Fi . 12 shows a power spectral distribution of an LED lamp ill a pre-sleep conjuration, in accordance with another embodiment presented. The pre-sieep configuration shown in FIG. 13 is produced by an array of LED dies in the 3:3:2:1 ratio, driven as follows: (1 ) three cyan LEDs driven at 7.65V, 66mA, 0.16679 radiant flux; (2) three mint LEDs driven parallel at II.13V, 95lmA, 1.8774 radiant flux; (3) two red-orange LEDs driven at 4.375V, 998mA, 0.96199 radiant flux; and (4) one royal blue LED driven at 2.582V, 30mA, 0.0038584 radiant f!ux. The total !uminous flux is l.024e+003 1 m. The total radiant f!ux is 3.023ge+000 W. The dominant wavelength is 580.3 nm. The general CR! is 87.30. The color temperature is 2871 K. The 1931 Coordinates (2°) are x: 0.4649, y: 0,4429. The luminous power per radiant watt is 338 lumens per radiant watt.

[0082] Fid. 13 shows a power spectral distribution of an LED lamp in a phase-shift configuration, in accordance with one embodiment presented. The phase-shift con¾«railon shown in F18, 4 is p oduced hy an array of LED dies in t e 3:3:2:1 ratio* driveri as fellows: (1) iiree cyan LEDs driven at 8JW, 235 &_} 0,47233 radiant fiux; (2;) three mint LEDs driven paraltel at 11.14V, 950mA, I.9047 radiant fiux; (3) two red-orange LEDs driven at 3.745V, 147mA, 0.1845 radiant flux; and (4) one royal blue LED driven at 2.802V, 525mA, 0.69093 radiant flux. The total luminous flux is 9.87ge+002 1 m. The total r di nt flux is 3 2l38e*QQiS , ΎΜ dominant aveleng h is 48S,6 nm. The peak wavelength is 44SJ nrti. The general CRI m ^; 8742. The color temperature Is 6, 99 K Tre 1931 Coordinates (2^s) are x: 0.3092, y: 0.3406. The luminous power per radiant watt is 307 lumens per radiant watt.

[0083] In an alternative embodiment, in the phase-shift configuration, the intensity levels of blue component in the 455nm to 485nm range is preferably greater than about 125% of the relative spectral power of any other peaks in the visible iight spectrum higher than 485nm. In alternative embodiments, the blue component in the 455nm to 485nm range may be is preferably greater than about 150%; or about 175%; or about 200%; or about 250%; or about 300% of the relative spectral power of any other peaks in the visible light spectrum higher than 485nm. The color rendering index is preferably greater than 80. By varying the radiant fluxes of one or more of the dies, for example by varying the current drawn by the dies, the intensity of the blue component relative to other spectral peaks greater than 485nm may be adjusted to the desired level.

[0084] FIG. 14 shows a power spectra! distribution of an LED lamp in a general lighting Gisaiguration, in accardanse ¾# one embodiment presented. The general lighting configuration shown in FIG. 15 is produced by an array of LED dies in the 3::3:2:1 ratio, driven as follows: (1 ) three cyan LEDs driven at 8.22V, 211 mA, 0.44507 radiant flux; (2) three mint LEDs driven parallel at 10.06V, 499mA, 1149$ radiant flax; (3) two red- orange LEDs driven at 3.902V, 254mA, 0.34343 radiant iux;: and {4} one blue LED driven at 2.712V, 190mA, 0.27280 radiant flux. The total luminous flux is 7.192e+002 1 m. The total radiant flux is 2.2248e+000 W. The dominant wavelength is 566.2 nm. The peak wavelength is 625.9 nm. The general CRI is 93.67. The color temperature is 4897 K. The 1931 Coordinates (2 ) are x: GJSii, y: 0.3874. The luminous power per radiant watt is 323 lumens per radian t wall [0085] In an alternative embodiment, In ti e general illuminatio conffurafian, the intensity levels of blue component in the 380n to ISnm range Is prefer fefy aboyi tOO i of the relative spectral power of any other peaks in the visible light spectrum higher than 485nm. In alternative embodiments, the intensity levels of blue component in the 380nm to 485nm range is preferably less than about 100%; or less than about 90%; or less than spoilt 80%; of between afcout 2Q to abou 100% of the relative spectral power of any other pe ks in the visible itghi spectrum higher than 485nm, The color rendering index is preferably greater than 85.

[0086] FIG. 15 is an exploded view of an LED lamp in accordance with another embodiment presented. f lCS. 15 shows an additional form factor in whieh the present ir eriion may be applied. For example, FIQ. 15 shows .a lamp 16Q0 having an array of LEDs 1610. The LEDs 1610 may be provided in the 3:3:2:1 ratio of cyan.mintred- orange:b!ue, as described above.

[0087] In another embodiment, the LEDs 1610 may be provided in a 3:3:2:3 ratio of cy¾niri int:rBi :¾ as dt senses' aoove. The LEDs are mouf W on a support flams 1620, whieh may serve as a heat-sink. LIP circuitry 1630 is used to drive the LED 16 0 with appropriate drive currents to achieve two or more output configurations (e.g., pre- sieep, phase-shift, and general lighting configurations). An output-select controller 1640 (and associated knob) are provided to allow an end-user to select the desired output configuration. An optic iSO Is provided in f ont of the LEDs 1610 to provide liff s ve effects. The form factor may fee with means such as screws and/or nuts and bolts, as shown.

Additional Embodiments

[0088] Figures 16, 17, and 18 show the power spectral distributions corresponding respectively to the pre-sleep, phase-shift, and general iuffiinat!ofi eonflg fiatloris of tie LED lamp in accordance with one embodiment of the !nventiori. The LED !arrip in Ms embodiment comprises an LED board with a ratio of Cyan, Mint, Red, and Blue dies of 3:3:2:3 respectively. The spectral output of the lamp according to each configuration is adjusted by generating radiant fluxes from multiple dies as described below. £0080} FiG. 18 shows a power Spectral distribution of an LED lamp ill a pre-sleep configuration, _.in accordance v$flrt ano her embodiment presented. The pre-sieep configuration shown in FiG. 13 is produced by an array of LED dies in the 3:3:2:3 ratio, driven as follows: (1 ) three cyan LEDs driven at 7.83V, 91 mA, to generate 0.2048 radiant watts; (2) three mint LEDs driven parallel at 9.42V, 288mA, 0.6345 radiant watts; (3) two racj-orar Qe LEDs driven at 4,077V, 98ίΜ₃ 0.S434 radiant watts. The don lr nt wavelength is δδ1 rm The general OR! i 71. Th color temperature Is 27 9 K. The luminous power per radiant watt is 331 lumens per radiant watt. The efficacy is 91 lumens per watt.

[0090] FiG. 17 shows a power spectral distribution of an LED lamp in a phase-shift configuration, in accordance with another embodiment presented. The phase-shift configuration shown in FIG. 18 is produced by an array of LED dies in the 3.3:2:3 ratio, driven as foilows: (1 ) three mint LEDs driven parallel at 11.27V, 988mA, 1.679 radiant watts; (2) two red-orange LEDs driven at 3.78V, 180mA, 1.971 radiant, and (3) three blue LEDs driven at EOJV, 2S8 A_! ®M radiarit watts. If dominant wavelength is 478J nm, The general JRI is 88, The color temperature Is 8235 ¼, The luminous power per radiant watt is 298 lumens per radiant watt. T e efficacy is 63 lumens per watt.

[0091] FIG. 18 shows a power spectral distribution of an LED lamp in a general lighting configuration, in accordance with another embodiment presented. The general lighting configuration show in FIG. 19 is produced by an array of LEO dies in the 3:3:2:3 ratio, driven as follows; } three cyan LESs dhve t 8,16V, MB , to generate 0.4332 radiant watts; (2) three mint LEDs driven parallel at 11.23V, 972mA, 1.869 radiant watts; (3) two red-orange LEDs driven at 3.89V, 295mA, 0.3520 radiant watts. The dominant wavelength is 565.6 nm. The general CRI is 9Q. The color temperature is 4828 K. The luminous power per radiant watt is 335 lumens per radiant watt. The efficacy is 88 lumens per watt

[0092] In another embodiment, there is provided a tunable LED lamp for producing a biologically-adjusted light output with a color rendering index above 70. The LED lamp comprises: a base; a housing attached to the base; a power circuit disposed within the housing and having electrical leads attached to the base; a driver circuit disposed within the housing and electrically coupled to the power circuit; and a heat sink disposed about the housing. The LED lamp further comprises: a plurality of LED dies mounted on a support coupled to the housing, wherein each of the plurality of LED dies is electrically coupled to and driven by the driver circuit. The plurality of LED dies includes two red LED dies, three cyan LED dies, four mint LED dies, and three blue LED dies. The LED lamp further comprises: an output-select controller electrically coupled to the driver circuit to program the driver circuit to drive the LED dies in one of a plurality of light output configurations. The plurality of light output configurations includes a pre-sleep configuration, a phase-shift configuration, and a general lighting configuration.

[0093] The output-select controller may include a user-input interface allowing a user to select the light output configuration. The LED lamp my further include an input sensor electrically coupled to the output-select controller to provide an input variable for consideration in the selection of the light output configuration. The input sensor may be a thermal sensor, a photo-sensor, and/or a GPS chip. The input variable may be selected from the group consisting of: an ambient temperature, a support temperature, an LED die temperature, a housing temperature, the light output produced by the lamp, an ambient light, a daily light cycle, a location of the lamp, an expected ambient light, a seasonal light cycle variation, a time of day, and any combinations and/or equivalents thereof.

[0094] In the pre-sleep configuration, the driver circuit drives the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about 380nm and about 485nm, is less than a&o I ^

any other peaks in the visible spectral output ats ¥e atjOui4i5nm. For example, the dfJvef circuit may drive the plurality of LED dies such that about 150mA of current is delivered to the mint LED dies; about 360mA of current is delivered to the red LED dies; and about 40mk of current Is delivered is the cyan LED dies.

|0Sii| tn the phase^s iff canffgurati n, the driver circuit drives the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about 455nm and about 485nm, is greater than about 125% of a relative spectral power of any other peaks in the visible spectral output above about 485nm. The color rendering index In the pnase-shift configuraiesn may be greater than 80, For ex m le, the driver circuit may drive the plurality of LED dies socn that about SIOrfiA of current is delivered to the mint LED dies; about 1800mA of current is delivered to the red LED dies; about 40mA of current is de!ivered to the cyan LED dies; and about 100mA of current is delivered to the blue LED dies.

[0096] In the general lighting configuration, the driver circuit drives the plurality of LED dies such that a blue output intensity level, in a visible spectra! output range of between about 380nm and about 485nm, is between about 100% to about 20% of a relatve spectral power of any other peaks in the visible spectral output above about 48Ifi . The color rendering Jricfex in tri general lighting configuration may be greater than 85. For example, the driver circuit may drive the plurality of LED dies such that about 450mA of current is delivered to the mint LED dies; about 230mA of current is delivered to the red LED dies; about 1 10mA of current is delivered to the cyan LED dies: and about 60mA of current is delivered to the blue LED dies.

[0097] In another embodiment, there is provided an LED lamp, comprising: a housing: a driver circuit disposed within the housing and configured to electrically couple to a power source: and a plurality of LED dies mounted on a support coupled to the housing, whereto e of the plu ality Qf LED dies is electrically coupled to and driven by the driver mm ft. The LED faoip further includes an output-select controller electrically coupled to the driver circuit to program the driver circuit to drive the LED dies in one of a plurality of Sight output configurations. The output-select controller may also include a user-input interface allowing a user to select the light output configuration.

[0098] The plurality of light output configurations includes a pre-sleep configuration and a general lighting configuration. The pluraiity of light output configurations may further include a phase-shift configuration. The plurality of LED dies may include red LED dies, cyan LED dies, mint LED dies, and blue LED dies. The ratio of red LED dies to cyan LED dies to mint LED dies to blue LED dies of 2:3:4:3, respectively. The LED lamp may be tunable to produce a biologically-adjusted light output with a color rendering index above 70.

[0099] The LED lamp may further comprise an input sensor electrically coupled to the output-select controller to provide an input variable for consideration in the selection of the light output configuration. The input sensor may be a thermal sensor, a photosensor, and/or a GPS chip. The input variable may be selected from the group consisting of: an ambient temperature, a support temperature, an LED die temperature, a housing temperature, the light output produced by the lamp, an ambient light, a daily light cycle, a location of the lamp, an expected ambient light, a seasonal light cycle variation, a time of day, and any combinations and/or equivalents thereof.

[00100] In the pre-sleep configuration, the driver circuit drives the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between spoilt 380nm ar d about 48Snm, Is less than about 10% -©f a relative spectral power of any other a s in the isible spectral output above about 48¾m. For example, tie driver circuit may drive the plurality of LED dies such that about 150mA of current is delivered to the mint LED dies; about 360mA of current is delivered to the red LED dies; and about 40 mA of eur« to the -cyan- LED dies.

{$01.013 isi the pfiase-shJft oonigfurats fi, the driver circuit drives the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about 455nm and about 485nm, is greater than about 125% (or greater than about 150%; or greater than about 200%) of a relative spectral power of any other peaks in the visible soeetral output above about 4SSpfrt Ifm color rendering index in the phase-shift eG fsgyraion may be greater iiari 80. Pot^" example, the driver circuit may drive the plurality of LED dies such that about 510mA of current is delivered to the mint LED dies; about 180mA of current is delivered to the red LED dies; about 40mA of current is delivered to the cyan LED dies; and about 100mA of current is delivered to the blue LED dies

[00102] In the general lighting configuration, the driver circuit drives the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about 380nm and about 485nm, is between about 100% to about 20% of a relative sp&etral power of any other peaies in the visible spectral output above about 48§rm T e color rendering index in the general lighting configuration may be greater than 85. For example, the driver circuit may drive the plurality of LED dies such that about 450mA of current is delivered to the mint LED dies; about 230mA of current is delivered to the red LED dies; about 110mA of current is delivered to the cyan LED dies; and about 60mA of current is delivered to the blue LED dies.

[00103] In another embodiment, there is provided a tunable LED lamp for producing a biologically-adjusted light output with a color rendering index above 70, comprising: a base; a housing attached to the base; a power circuit disposed within the housing and having electrical leads attached to the base; a driver circuit disposed within the housing and electrically coupled to the power circuit; a heat sink disposed about the housing; a plurality of LED dies mounted on a support coupled to the housing, wherein each of the plurality of LED dies is electrically coupled to and driven by the driver circuit, and wherein the plurality of LED dies includes a ratio of two red-orange LED dies to three cyan LED dies to three mint LED dies to one blue LED dies; and an output-select controller electrically coupled to the driver circuit to program the driver circuit to drive the LED dies in one of a plurality of light output configurations, wherein the plurality of light output configurations includes a pre-sleep configuration, a phase-shift configuration, and a general lighting configuration. In the pre-sleep configuration, the driver circuit may drive the plurality of LED dies such that about 950mA of current is delivered to the mint LED dies, about 1 ,000mA of current is delivered to the red-orange LED dies, about 65mA of current is delivered to the cyan LED dies; and about 30mA of current is delivered to the blue LED dies. In the phase-shift configuration, the driver circuit may drive the plurality of LED dies such that about 950mA of current is delivered to the mint LED dies, about 150mA of current is delivered to the red-orange LED dies, about 235mA of current is delivered to the cyan LED dies, and about 525mA of current is delivered to the blue LED dies. In the general lighting configuration, the driver circuit may drive the plurality of LED dies such that about 500mA of current is delivered to the mint LED dies, about 250mA of current is delivered to the red-orange LED dies, about 210mA of current is delivered to the cyan LED dies, and about 190mA of current is delivered to the blue LED dies, !n other embodiments, alternative currents may be delivered to vary the radiant fluxes and achieve the desired spectral output.

[00104] In yet another embodiment, there is provided a method of manufacturing a tunable LED lamp for producing a biologically-adjusted light output with a color rendering index above 70. The method comprises: (a) attaching a base to a housing; (b) electrically coupling leads of a power circuit within the housing to the base; (c) electrically coupling a driver circuit disposed within the housing to the p r .circuits (d) ourslrig ¾ plurality of LED dies on a support coupled to the housing sucfi that each of the plurality of LED dies is electrically coupled to and driven by the driver circuit, and wherein the plurality of LED dies includes two red LED dies, three cyan LED dies, four mint LED dies, and three blue LED dies; and (e) configuring the driver circuit to drive the LED dies in one of a plurality of light output configurations, wherein the plurality of light output configurations includes a pre-sleep configuration, a phase-shift configuration, and a genera! lighting configuration.

[00105] The method may further comprise: (f) configuring the driver circuit to drive i plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about SSOnrn and about 485nm, is less than about 10% of a relative spectral power of any other peaks in the visible spectral output above about 485nm; (g) configuring the driver circuit to drive the plurality of LED dies such that a blue output intensity Sey¾i_f m a visibfe spectraLootbut range of between about 4SShm anet about 48§f m, is greater tha about 1¾5¾¾ of a relative spectral power of any ether peaks i the visible spectral output above about 485nm; and/or (h) configuring the driver circuit to drive the plurality of LED dies such that a blue output intensity level, in a visible spectral output range of between about 380nm and about 485nm, is between about 100% to about 20% of a relative spectral power of any other peaks in the visible spectral output above about 485nm.

[00106] The method may further comprise: (i) configuring the driver circuit to drive the plurality of LED dies such that about 150mA of current is delivered to the mint LED dies, about 360mA of current is delivered to the red LED dies, and about 40mA of current is delivered to the ©yah LED dies; |) oorffigu ring the driver circuit to drive ί the plurality of LED dies suc that about il QmA of current is delivered to the mint LED dies, about 180mA of current is delivered to the red LED dies, about 40mA of current is delivered to the cyan LED dies, and about 100mA of current is delivered to the blue LED dies; and/or (k) configuring the driver circuit to drive the plurality of LED dies such that about 4i0mA of current is delivered to the mint LED dies, about 230mA of eu wif is delivered to the red LED dies, about 1 10mA of current is delivered to the cyan LED dies, and about 60mA of current is delivered to the blue LED dies.

[00107] In another embodiment, there is provided an LED lamp comprising a housing, a driver circuit disposed within the housing and configured to electrically couple to a power source, and a plurality of LED dies mounted on a support coupled to the housing. Each of the plurality of LED dies may be electrically coupled to and driven by the driver circuit; and an output-select controller electrically coupled to the driver circuit to program the driver circuit to drive the LED dies in one of a plurality of light output configurations, wherein the plurality of light output configurations includes a pre-sleep configuration and a genera! lighting configuration. The plurality of LED dies includes red- orange LED dies, cyan LED dies, mint LED dies, and blue LED dies. The plurality of LED d es ineWes a ratio of red-orange LED dies to cyan LED dies to mint LED dies to blue LED dies of 2:3:3; 1, respectively,

[00108] In another embodiment, there is provided a method of manufacturing a tunable LED lamp for producing a biologically-adjusted light output with a color rendering index above 70, comprising: attaching a base to a housing; electrically coupling leads of a power circuit within the housing to the base; electrically coupling a driver circuit disposed within the housing to the power circuit; mounting a plurality of LED dies on a support coupled to the housing such that each of the plurality of LED dies is electrically coupled to and driven by the driver circuit, and wherein the plurality of LED dies includes two red- orange LED dies, three cyan LED dies, three mint LED dies, and one blue LED dies; and configuring the driver circuit to drive the LED dies in one of a plurality of light output configurations, wherein the plurality of light output configurations includes a pre-sleep configuration, a phase-shift configuration, and a general lighting configuration. In the pre- sleep configuration the method may further comprises configuring the driver circuit to drive the plurality of LED dies such that aboaf 150mA of currerst Is delivered to i e mint LED dies, about 1 ,000mA of current is delivered to the mcl-OMfltge LED dies, about 85mA of current is delivered to the cyan LED dies, and about 30mA of current is delivered to the blue LED dies, in the phase-shift configuration the method may further comprise: configuring the driver circuit to drive the plurality of LED dies such that about 950mA of current is delivered to the mint LED dies, about 150mA of current is delivered to the red LED dies, about 235mA of current is delivered to the cyan LED dies, and about 525mA of current is delivered to the blue LED dies, in the general lighting configuration the method may further comprise: configuring the driver circuit to drive the plurality of LED dies such that about 500mA of current is delivered to the mint LED dies, about 250mA of current is delivered to the red LED dies, about 210mA of current is delivered to the cyan LED dies, and about 190mA of current is delivered to the blue LED dies. £O010$J ft ί\ί be evident to t ose skilled in the art, that other die configuration or curren serlernes may be employed to achieve the desired spectrai output of the LED lamp for producing biologically adjusted light.

[00110] In another embodiment, there is provided an LED lamp comprising a housing, a driver circuit disposed within the housing and configured to electrically couple to a power source, and a plurality of LED dies mounted on a support coupled to the housing. Each of the plurality of LED dies may be electrically coupled to and driven by the driver circuit. The plurality of LED dies may include mint LED dies, hyper red LED dies, and blue LED dies. In some embodiments, the plurality of LED dies includes a ratio of mint LED dies to hyper red LED dies to blue LED dies of 15:5:4, respectively.

[00111] In some embodiments, ail of the plurality of LED dies may be serially connected. Furthermore, the driver circuit may be configured to operate the plurality of LED dies such that a relative peak intensity of light emitted by the blue LED dies is within the range from 90% to 100% of a peak intensity of light emitted by the hyper red LED dies ¾r$ a f$8¾¾? peak I enslty of light o ttecf by the mint LED dies is within the range from 50% to 60% of the peak intensity of light emitted by the hyper red LED dies.

[00112] Additionally, the driver circuit may be configured to operate the plurality of LED dies to emit light having a color temperature of at least 6,200 K. More specifically, the driver circuit may be configured to operate the plurality of LED dies to emit light having a color temperature of ,240 K.

f illSf Addjteail , ti© driver eircust may be configured to operate the plurality of LED dies to emit light having a color rendering index of at least 90. More specifically, the driver circuit may be configured to operate the LED dies to have a color rendering index of 92.2.

[00114] In another embodiment, there is provided an LED lamp comprising a housing, a driver circuit disposed within the housing and configured to electrically couple to a power source, and a plurality of LED dies mounted on a support coupled to the housing. Each of the plurality of LED dies may be electrically coupled to and driven by the driver circuit. The plurality of LED dies may include mint LED dies, hyper red LED dies, and blue LED dies. In some embodiments, the plurality of LED dies includes a ratio of mint LED dies to hyper red LED dies to blue LED dies of 1 :1 :1 , respectively. Furthermore, the plurality of LED dies may comprise 7 mint LED dies, 7 hyper red LED dies, and 7 blue LED dies.

[00115] In some embodiments, each of the like-colored LED dies may be serially connected. That is to say, the mint LED dies may be serially connected, the hyper red LED dies may be serially connected, and the blue LED dies may be serially connected. Furthermore, the driver circuit may be configured to direct mwr to the arious serially- connected LED dies unequally. In some embodiments, the driver circuit may deliver power to the plurality of LED dies in a ratio of 6.9 watts to the mint LED dies, 3.2 watts to the hyper red LED dies, and 2.0 watts to the blue LED dies.

[00116] In some embodiments, the driver ^fcult may be configured to operate tiie plurality of LED dies such that a relative peak tetenssiy of light emitted by in© tslye LEO dies is within the range from 80% to 90% of a peak intensity of light emitted by the hyper red LED dies and a relative peak intensity of light emitted by the mint LED is within the range from 30% to 40% of the peak intensity of light emitted by the hyper red LED dies. |0i1 7J Additionall , the driver eirc«it may fee eoft!gufed t operate t e pluralit of LED dies to emit igiit haying a color temperatur of at least 1,200 K. Mom specifically, the driver circuit may be configured to operate the plurality of LED dies to emit tight having a color temperature of 6,202 K.

[00118] Additionally, the driver circuit may be configured to operate the plurality of LED dies to emit light having a color rendering index of at least fO. More specifically, t e driver circuit may be configured to operate the LED dies to have a eolor Fendering Index of 91.3.

[00119] Referring now to FIG. 19, an additional embodiment of the invention is presented. FIG. 19 presents a plotting 1900 of the scaled spectral power distribution of a lighting device according to an embodiment of the invention. In some embodiments, the lighting device may be structurally similar to the luminaire presented in either FIGS. 2-7 and/or FIG. 15, or may be a troffer lighting fixture, such as those presented in U.S. Patent Application Serial No. 14/853,516 titled illumination and Grow Light System and Ass iated Meih fs, US, De gn Patent Ho. D744,689 titled Troffer Luminaire, and U.S. Design Patent o. 0738,032 titled Bqusm Troffer Luminaire, the contents of each of which are incorporated herein by reference except to the extent disclosure therein is inconsistent with disclosure herein.

[00120] The LED packages of the present embodiment may be populated by, and in some embodiments consist of, at least one LED operable to emit light having a peak wavelength within the range from about 450 nm to about 455 nm, including a peak intensity of about 4S0 ii , d-efmect as a blue LED, and at least one LED operable to emit light haying a pe k intensity within the r nge from about 475 nm to about 495 nm, defined as a cyan LED. In some embodiments, the cyan LED may emit light having a peak intensity within the range from about 480 nm to about 490 nm. In some embodiments, the cya LEO may have a peak iniensMy within the range from about 480 nm to about 495 nm. The LED packages may exclude LEDs operable to emit light above 500 nm or, alternatively, above 600 nm. in some embodiments, there may be a plurality of LED packages, each consisting of LEDs configured to emit light having the same spectral power distribution. Furthermore, a first LED package of the plurality of LED packages may emit light having a first color, and a second LED package may emit light having a second color that is different from the first. For example, the first LED package may comprise blue LEDs and the second LED package may comprise cyan LEDs. Furthermore, the first LED package may comprise a color conversion layer, as described hereinbelow.

[00121] The LED packages may have a ratio of blue LEDs to cyan LEDs within the range from 1 :3 to 3:1. in some embodiments, the ratio of blue LEDs to cyan LEDs may be approximately 1 :1.

[00122] Furthermore, the LED packages may comprise a color conversion layer operable to absorb light emitted by the blue LED and emit light having a peak wavelength within the range from about 580 nm to about 630 nm, specifically having a peak within the range from about 590 nm to about 595 nm. The color conversion layer may perform a Stokes shift on light within the range from about 440 nm to about 460 nm. Moreover, the color conversion iayer may be operable to emit light excluding an intensity peak above 600 nm. In some embodiments, the color conversion Iayer may be applied to the blue LED. Advantageously, the present embodiment may require no more than a single phosphor material to result in a spectrum as described hereinbelow. £001233 Tr e Signing device may fee operable to emit light have lighting Characteristics Including a; CRI of at least 10, and a CRI #9 strong red value of at least 40. in some embodiments, the device may emit !ight having a CRI #9 strong red value of at least 50. in some embodiments, the device may emit light having a CRI #9 strong red value of at least 90. Furthermore, the lighting device may be operable to emit light having a CCT of less than 6,000 K. In some embodiments, t e ¾ ttng device may fee operable to emit light having a CCT within the range from about 4,900 Kto about S,100 SC isn some embodiments, the lighting device may be operable to emit light having a CCT that is less than 5,000 K. In some embodiments, the lighting device may be operable to emit light having a OCT it in the range from about 3,800 K t<¾ about 4,10:0 K. in seme embedmen s, the ighting device may be operable to emit light having a CCT that is less than 4,000 K.

[00124] Additionally, the lighting device may be operable to emit light having a trough in its spectra! power distribution within the range from about 450 nm to about 475 nm. In some embodiments, the trough may be centered within the range from about 460 nm to about 470 nm.

[00125] In an alternative embodiment, the lighting device may comprise a plurality of LED packages comprising at least one blue LED, at least one cyan LED, and at least one red LED. Furthermore, in such embodiments, the LED packages may comprise a phosphor as described in the previous embodiment. In some embodiments, the LED packages may have a ratio of blue LEDs to cyan LEDs to red LEDs of 10:3:1. Additionally, the CRI for such embodiments may be approximately 94.

[00126] In each of the embodiments described hereinabove, it is further contemplated that the pluralities of LEDs may fee fabricated as a ch p-on-board GOB*) package. For example, where the lighting device compfises cyan and b!ue LE¾, eac of the cyan and blue LEDs may be fabricated and comprised by a single COB package, and one or more COB packages may be comprised by the lighting device. Furthermore, the COB package may comprise a color conversion material as described hereinabove. For example, where a potting compound is used in the process of attaching the LED COB package to an LEB board, the potting compound may be generally transparent or translucent, and may comprise a color conversion material. [00127] The foregoing description of the invention has been presented for purposes of iilustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Other modifications and variations may be possible in light of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and to thereby enable others skilled in the art to best utilize the invention in various embodiments and various modifications as are suited to the particular use contemplated. It is intended that the appended claims be construed to include other alternative embodiment of the invention; snefyd nf e uiv eni structures, cor neftts, methods, and means.

£0δ 2δ| ft is to be appreciated that the Detailed Description section, and not the Summary and Abstract sections, is intended to be used to interpret the claims. The Summary and Abstract sections may set forth one or more, but not all exemplary embodiments of the present invention as contemplated by the inventor(s), and thus, are not intended to limit the present invention and the appended claims in any way.

Claims

That Which is Ciaimed is:

1. An LED lamp 100 comprising:

a housing 115;

a driver circuit 440 configured to electrically coup!e to a power source; and an LED package 200 that is electrically coupled to and driven by the driver circuit 440, the LED package comprising:

a first LED configured to emit light having a peak intensity of about

450 nm,

a second LED

the range from 475 nm to 495 nm, and

a color conversion material configured to perform a Stokes shift on light having a wavelength within the range from 440 nm to 460 nm.

2. The LED lamp 100 according to Claim 1 w e ein light emitted by the LED lamp 100 is configured to emit light that sy resses melatonin seereiior in an observer.

3. The LED lamp 00 according to Claim 1 wherein the LED lamp 100 does not comprise an LED configured to emit light having a peak intensity at a wavelength greater than 600 nm.

4. The LED lamp 100 according to Claim 1 wherein the LED lamp 100 does not comprise a color conversion material configured to emit light having a peak intensity at a wavelength greater than 600 nm.

5. The LED lamp 100 according to Claim 1 wherein the LED package 200 consists of:

a first LED configured to emit light having a peak intensity of about 450 nm; a second LED configured to emit iight having a peak intensity within the range from 475 nm to 495 nm; and

a color conversion material configured to perform a Stokes shift on Iight having a waveiength within the range from 440 nm to 460 nm.

6. The LED lamp 100 according to Claim 1 comprising a plurality of LED packages 200.

7. The LED !amp 100 according to Claim 6 wherein the plurality of LED packages 200 consists of LED packages comprising:

a first LED configured to emit Iight having a peak intensity of about 450 nm;

a second LED configured to emit Iight having a peak intensity within the range from 475 nm to 495 nm; and

a color conversion material configured to perform a Stokes shift on Iight having a wavelength within the range from 440 nm to 460 nm.

8. The LED lamp 100 according to. Claim: 6 wherein ifw !ura!il of LED packages 200 consists of LED packages consisting of:

a first LED configured to emit Iight having a peak intensity of about 450 nm;

9. The LED lamp 100 according to Claim 1 wherein iight emitted by the LED lamp 100 has a CRi of at ieast 90.

10. The LED lamp 100 according to Claim 1 wherein Iight emitted by the LED lamp 100 has a CCT of less than 5000K.

11. The LED !amp 100 according to Claim 1 wherein light emitted by the LED lamp 100 has a CRi #9 value of at least 40.

12. The LED lamp 100 according to Claim 11 wherein light emitted by the LED lamp 100 has a CCT of less than 4000K.

13. The LED lamp 100 according to Claim 1 wherein the color conversion material is configured to emit light having a peak intensity within the range from 500 nm to 599 nm.

14. The LED lamp 100 according to Claim 1 wherein the second LED configured to emit light having a peak intensity within the range from 480 nm to 490 nm.

15. The LED lamp 00 according l¾ Claim 1 whefe n the tisuslRg: 11S is configured to facilitate the attachment of

16. The LED lamp 100 according to Claim 1 further comprising an output select controller electrically coupled to the driver circuit 440 to program the driver circuit 440 to < sie the LED pacfeacp MQ in one of a plurality of light output

^nflSu^Si S, w ieift -the,pl«fS |ty- l§H output configurations includes a general lighting configuration and a phase-shift configuration.

17. The LED lamp 100 according; to Ciaim 1 wherein lght output in the phase-shift configuration has a peak intensity within the range from 475 nm to 49Q nm that is greater than a peak intensity within the range from 475 nm to 490 nm of the light output in the general lighting configuration.

18. An LED !amp 100 comprising:

a housing 115;

a driver circuit 440 configured to electrically couple to a power source; and a plurality of LED packages 200 that are electrically coupled to and driven by the driver circuit 440, each LED package of the plurality of LED packages

comprising:

a first LED configured to emit light having a peak intensity of about

450 nm,

a second LED configured to emit light having a peak intensity within the range from 475 nm to 495 nm, and

a color conversion material configured to perform a Stokes shift on light having a wavelength within the range from 440 nm to 460 nm;

whsreiii the LED lam 190 does not comprise an LED or a color coh rsion material configured to emit light having a wavelength greater than 600 nm; and

wherein light emitted by the LED lamp 100 has a CRi of at least 90.

19. The LED lamp 100 according: l¾ Claim 18 wfefsl i llgHt emitted by the LED lamp 100 has a CCT of less than 5GQ0& and a CRI #9 value of at least 40,

20. An LED lamp 100 comprising:

a housing 115;

a driver circuit 440 configured to electrically couple to a power source; and an LED package 200 that is electrically coupled to and driven by the driver circuit 440, the LED package consisting of:

a first LED configured to emit light having a peak intensity of about

450 nm,

a second LED configured to emit light having a peak intensity within the range from 475 nm to 490 nm, and

wherein Sight errittecf by tte LED lamp 100 has a CRI of at least 90, a CRI #9 value of at least 40, arsd a CGT of less than 4000K.