ANSI-IESNA LM-63-02 - Standard File Format For The Electronic Transfer of Photometric Data PDF
ANSI-IESNA LM-63-02 - Standard File Format For The Electronic Transfer of Photometric Data PDF
ANSI-IESNA LM-63-02 - Standard File Format For The Electronic Transfer of Photometric Data PDF
Standard File Format for the Electronic Transfer Photometric plane - A plane, not a cone, upon which
of Photometric Data photometric data is measured. In Types A and C pho-
tometry, the planes are all vertical and share a com-
mon vertical axis. In Type B photometry, the planes
share a common horizontal axis.
1.0 INTRODUCTION
Photometric zero - Refers to a vertical direction from
This is the fourth revision of this standard. Since its photometric center that is coincident with horizontal
introduction in 1986 (IESNA LM-63-1986), this stan- angle 0° and vertical angle 0° for Types B and C pho-
dard has proved to be very useful and powerful. This tometry. For Type A, the direction is coincident with
revision further clarifies the standard to make its use horizontal angle 0° and vertical angle -90°.
as simple as possible.
Relative photometry - Consists of the evaluation of
the photometric characteristic of a lamp by compari-
son with the assumed lumen or spectral output of a
2.0 LIMITS OF SCOPE test lamp.
This document describes the ANSI/IESNA LM-63- Search string - A group of characters created by the
2002 data system and how to build a file using this user of the photometric file located to the right of the
system. This recommended standard addresses pho- keyword [SEARCH]. These strings may be used by
tometric data file formats specifically for data transfer, software to locate photometric files based on encod-
however, it is recognized that this standard is often ed characteristics.
used for data storage and retrieval.
Vertical angles -The angular displacement in degrees
from straight down (referred to as nadir in the IESNA
Lighting Handbook).
3.0 KEY DEFINITIONS
Zero degree photometric plane - A vertical plane
Absolute (or direct) photometry - Consists of the passing through photometric center containing photo-
simultaneous comparison of a standard lamp and an metric zero and photometric horizontal.
unknown light source.
Delimiter- Used to delineate data in a file. Acceptable 4.0 SUMMARY OF MODIFICATIONS FROM
delimiters are: a comma, a space, multiple spaces, or IESNA LM-63-1995
a carriage-return and line-feed character sequence.
Goniophotometer - A photometer for measuring the The following is a summary of the major changes
directional light distribution characteristics of sources, from LM-63-1995 to LM-63-2002:
luminaires, media and surfaces.
● The first line in the file is now IESNA:LM-63-2002
Horizontal angles - Measurements in degrees of (see Section 5.1).
angular displacement measured counterclockwise in ● All lines can now be 256 characters in length
a horizontal plane for Type C photometry and clock- (see Section 6).
wise for Type A and B photometry. ● All IESNA LM-63-2002 filenames shall now have
the file extension ies or IES.
Keyword - Square bracketed words used in IESNA ● The following keywords are now required: [TEST],
LM-63-2002 to label data. [TESTLAB], [MANUFAC], and [ISSUEDATE]
(see Section 5.2).
Photometric horizontal - Refers to a horizontal direc- ● [DATE] keyword replaced with [ISSUEDATE]
tion from photometric center that is coincident with (see Annex B).
horizontal angle 0° and vertical angle 90° for Types B ● [BLOCK] and [ENDBLOCK] keywords have been
and C photometry. For Type A, the direction is coinci- removed.
dent with horizontal angle 0° and vertical angle 0°. ● All tilt filenames (TILT=<filename>) shall now
have the file extension tlt or TLT (tilt format
moved to Annex G).
● Definitions of the Luminous Opening have been
expanded and, in some cases, modified. The fol-
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5.5 <lumens per lamp> The following dimensions refer to the luminous (that is,
light emitting) opening of the luminaire, not its physical
This field shall contain a number indicating the dimensions. They are meant to approximate the
lumens per lamp on which the photometric test is luminous opening (either as a luminous area or
based. In the case of absolute photometry, where the volume) for lighting calculations. They are not intended
lumens per lamp are not the basis for the photometric for computer-generated renderings of the luminaire. It
data, enter negative one (-1). is assumed that there is only one luminous opening in
each IESNA LM-63-2002 data file.
● NOTE: For most luminaires with more than one
lamp, the lamps will all be of the same type with The luminous dimensions apply to a luminaire aimed
the same lumen output. at "photometric zero" (0° horizontal, 0° vertical,).
"Photometric horizontal" would be (0° horizontal, 90°
● For those luminaires with two or more lamps with vertical).
different lumen output, this value shall be treated
as the average lumens per lamp. The product: "Length" and "Width" measurements refer only to
<lumens per lamp> x <number of lamps> shall be their orientation with respect to the zero-degree
the total lumen output by all lamps operating in photometric plane; they do not refer to the luminaire
the luminaire. dimensions or lamp orientation. In particular, the
"length" measurement may be less than the "width"
● When creating reports with absolute photometry measurement.
«lumens per lamp> = -1), it is suggested to
include the keyword [OTHER] indicating the can- 5.10 <units type>
dela values are absolute and should not be fac-
tored for different lamp ratings. This is an integer indicating the type of units used for
the luminous dimensions of the luminaire, and shall be
5.6 <multiplier> the value 1 or 2, according to the following schedule:
This field shall contain a number indicating the multi- 1) Luminous dimensions are given in feet
plying factor that shall be applied to all candela 2) Luminous dimensions are given in meters
values in the file. This is often 1.0, but may be a
value other than 1.0. 5.11 <width>
5.7 <number of vertical angles> This field shall contain a number indicating the dis-
tance across the luminous opening when measured
This field shall contain a number indicating the total perpendicular to the 0° photometric plane (perpen-
number of vertical angles in the photometric report. dicular to "photometric horizontal" - see Figure 1,
Table 1 and Annex D for additional details).
5.8 <number of horizontal angles>
5.12 <length>
This field shall contain a number indicating the total
number of horizontal angles in the photometric report. This field shall contain a number indicating the dis-
tance across the luminous opening when measured
5.9 <photometric type> parallel to the 0° photometric plane (along "photomet-
ric horizontal" - see Figure 1, Table 1 and Annex D
This is an integer indicating the type of photometry for additional details).
that exists for the luminaire being described, and
shall be the value 1, 2, or 3, according to the 5.13 <height>
following schedule:
This field shall contain a number indicating the overall
height of the luminous opening, measured parallel to
1) Type C
"photometric zero" (see Figure 1, Table 1 and
2) Type B
Annex D for additional details).
3) Type A
Luminous Shape
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As defined in the previous paragraphs, the luminous luminaire performance data from laboratory test con-
opening is assumed to be rectangular. To describe ditions to actual field conditions. Values in the file do
luminous openings of other shapes (including 3D), not include ballast factor. This factor shall be applied
see Table 1. This table is based on a simple principle: to all candela values in the file at application time.
if the dimension is positive, it represents a squared
off shape. If two dimensions are negative, the 5.15 <future use>
luminous opening is rounded when viewing the plane
containing those two dimensions. This element is reserved for future use. Set equal to
one (1) to remain compatible with previous versions
This document acknowledges that not all luminous of LM-63.
openings can be specified using the indicated width,
length, and height values. It is the responsibility of the 5.16 <input watts>
supplier to select the shape that best describes the
luminous opening. This field shall contain a number indicating the total
watts input to the luminaire including ballast watts.
● NOTE: Some changes have been made from
IESNA LM-63-1995. Circular, Sphere, Vertical 5.17 <vertical angles>
Cylinder, Horizontal Cylinder, Ellipse and
Ellipsoid have a different form in this standard. The vertical angles for which data are present in the
photometric report shall be listed in ascending order.
● See Annex D for drawings of these and other
shapes. ● For Type C photometry, the first value shall be
either 0 or 90 degrees, and the last angle value
5.14 <ballast factor> shall be either 90 or 180 degrees.
This field shall contain a number indicating the ballast ● For Type A or B photometry, the first vertical
factor of the luminaire. The ballast factor describes angle shall be -90 or 0 degrees, and the last
the application characteristics of the luminaire. It angle value shall be 90 degrees.
represents the fractional lumens of a lamp(s)
operated on a commercial ballast compared to the 5.18 <horizontal angles>
lumens when operated on a standard (reference)
ballast used for rating lamp lumens. If ballast factor is The horizontal angles for which data are present in
not known, default value shall be 1.0. the photometric report shall be listed in ascending
order.
For application purposes, this factor is used to adjust For Type C photometry, the first value shall always be
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For Type C photometry, the first value shall always 5.19 <candela values>
be 0 degrees, and the last value shall be one of the
following: ● <candela values for all vertical angles at the 1 st
horizontal angle>
1) 0 - in this case, there is only one horizontal angle, ● <candela values for all vertical angles at the 2nd
and the luminaire is assumed to be laterally horizontal angles>
symmetric in all planes.
● :
● <candela values for all vertical angles at the last
2) 90 - the luminaire is assumed to be symmetric in
each quadrant. horizontal angle>
3) 180 - the luminaire is assumed to be symmetric List of candela values corresponding to each vertical
about the 0 to 180 degree plane. angle of photometry. The order of the candela values
shall exactly correspond to the list of vertical angles.
4) 360 - in this case, the luminaire is assumed to Successive planes are listed in a sequence corre-
exhibit no lateral symmetry. sponding to the list of horizontal angles, and the first
candela value for each horizontal angle shall begin a
For Type A or B photometry, there are two possibilities: new line. Any of the values may be continued on a
second and subsequent lines if necessary.
1) The luminaire is laterally symmetric about a verti-
cal reference plane. In this case, the first
horizontal angle shall be zero, and the last
horizontal angle shall be 90 degrees.
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3) All lines from the first through the TILT= line are
read using text-mode.
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References
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The keyword:
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Luminaire characteristics:
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Annex C -Example
IESNA: LM-63-2002
[TEST] ABC1234
[TESTLAB] ABC Laboratories
[ISSUEDATE] 18-FEB-2001
[MANUFAC] Aardvark lighting Inc.
[LUMCAT] SKYVIEW 123-XYZ-abs-400
[LUMINAIRE] Wide beam flood to be used
without tilt
[LAMPCAT] MH-400-CLEAR
[LAMP] 400 Watt Metal Halide
[BALLASTCAT] Global 16G6031-17R
[BALLAST] 400W 277V MH Magnetic
[MAINTCAT] 4
[OTHER] This luminaire is useful as an indirect flood
[MORE] and to reduce light pollution in down light applications.
[LAMPPOSITION] 0,0
[SEARCH] POLLUTION SPORTS INDIRECT
[_NEMATYPE] 4h x 6v
[_PRICE] Make us an offer
TILT=INCLUDE
1
13
0 15 30 45 60 75 90 105 120 135 150 165 180
1.0 .95 .94 .90 .88 .87 .98 .87 .88 .90 .94 .95 1.0
1 50000 1 5 3 1 1 .5 .6 0
1.0 1.0 495
0 22.5 45 67.5 90
0 45 90
100000 50000 25000 10000 5000
100000 35000 16000 8000 3000
100000 20000 10000 5000 1000
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With the use of <width>, <length>, and <height> it is possible to describe various luminous openings as shown
in the following figures.
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The format for tilt information is the same whether it This field shall contain a number indicating the total
is in a separate file or included as part of the number of pairs of angles and corresponding multi-
photometric file. Each of the items listed in the format plying factors.
are described in the sections below. Each line shall
begin a new line in the file. Note: The tilt data are real F.3 <angles>
values except: <lamp to luminaire geometry> and
<number of tilt angles>, which are integer values The angles shall be listed in increasing order, and
(exponential notation is not allowed). shall go from 0 to 90 degrees or from 0 to 180
degrees, inclusive.
● <lamp to luminaire geometry>
● <number of tilt angles> F.4 <multiplying factors>
● <angles>
● <multiplying factors> The multiplying factors shall be listed in order corre-
sponding with the angles given in the line above.
This indicates the orientation of the lamp within the The following is an example of including the tilt infor-
luminaire, and shall be the value l, 2, or 3, according mation in the photometric file.
to the following schedule (see Figure F-1).
TILT=INCLUDE
1) When the luminaire is aimed straight down, the 1
lamp is either vertical base up or vertical base 7
down. 0 15 30 45 60 75 90
2) When the luminaire is aimed straight down, the 1.0.95.94.90.88.87.94
lamp is horizontal. The lamp remains horizontal
when the luminaire is tilted up in the 0 degree The following is an example of including the tilt infor-
horizontal plane. mation in an external file.
3) When the luminaire is aimed straight down, the
lamp is horizontal. When the luminaire is tilted in TILT =ExampleTiltFile. TLT
the 0 degree horizontal plane, the lamp tends to
a base up or base down condition as a result of ExampleTiltFile.TLT would be an ASCII text file con-
the luminaire tilt. taining the following four lines:
Figure F-1. Plan view of lamp to luminaire geometry when luminaire tilt information is included using the
TILT=INCLUDE or TILT=<filename> options. Labeled angles are horizontal angles. The lamps are; (a) vertical base
down, (b) horizontal along the 90 degree plane, and (c) horizontal along the 0 degree plane.
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