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    Pit Illumination Calculation

    Uploaded by

    Ian Galeon
    This document calculates the illumination for rooms 43-701 and 43-702. It determines that 40 luminaires are needed in each room to provide a minimum average illuminance of 750 lux. The existing design fails to meet this requirement, while the new proposed design of 40 Lynx-DE Superia 13W/84 G24Q-1 SLV luminaires in each room achieves an average illuminance of 758.16 lux, passing the minimum requirement.

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    Pit Illumination Calculation

    Uploaded by

    Ian Galeon
    20 views5 pages
    This document calculates the illumination for rooms 43-701 and 43-702. It determines that 40 luminaires are needed in each room to provide a minimum average illuminance of 750 lux. The existing design fails to meet this requirement, while the new proposed design of 40 Lynx-DE Superia 13W/84 G24Q-1 SLV luminaires in each room achieves an average illuminance of 758.16 lux, passing the minimum requirement.

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    PIT

    Original Title

    PIT-ILLUMINATION-CALCULATION

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    This document calculates the illumination for rooms 43-701 and 43-702. It determines that 40 luminaires are needed in each room to provide a minimum average illuminance of 750 lux. The existing design fails to meet this requirement, while the new proposed design of 40 Lynx-DE Superia 13W/84 G24Q-1 SLV luminaires in each room achieves an average illuminance of 758.16 lux, passing the minimum requirement.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    20 views5 pages

    Pit Illumination Calculation

    Uploaded by

    Ian Galeon
    This document calculates the illumination for rooms 43-701 and 43-702. It determines that 40 luminaires are needed in each room to provide a minimum average illuminance of 750 lux. The existing design fails to meet this requirement, while the new proposed design of 40 Lynx-DE Superia 13W/84 G24Q-1 SLV luminaires in each room achieves an average illuminance of 758.16 lux, passing the minimum requirement.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 5

    ILLUMINATION CALCULATION

    Efficiency Method of Illumination Calculation


    ROOM DIMENSIONS 43-701 AND 43-702:
    L= 10 m
    W= 7 m
    H= 2.6m (ceiling-to-floor height)
    h= 2.48m (luminaire-to-work plane height)

    REQUIRED QUALITY OF LIGHT:


    Computer Laboratory Room
    Required Illuminance, E= 750 lux

    SELECTED LAMP/LUMINAIRE SET:


    Lynx-DE Superia 13W/84 G24Q-1 SLV
    Nominal lamp power 13 W
    Lamp flux 900 lm
    Luminous efficacy 69 lm/W
    CCT 3400 K
    CRI 82
    LOR 85%
    ULOR 84%
    DLOR 81%
    Total flux 900 lm
    Total power 13 W
    Mounting mode Compact Flourescent
    Shape and measurements Length: 134 mm
    Width: 6.676 mm
    Height: 134 mm
    LUMINARIES CEILING MOUNTED REFLECTANCE TABLE

    This table shows the room utilization factor for numerous combinations of room factors
    and reflectance (always assuming ideal dispersion). The illuminance E required in a room of area
    L x W is achieved with n luminaires that have an efficiency ηLB and with lamps with a luminous
    flux φ.

    CALCULATION:
    Efficiency = η = 0.81
    Reflectance (ρ)
    ρ Ceiling = 0.8
    ρ Wall = 0.5
    ρ Work surface = 0.3
    Room Utilization Factor (uf)
    LW (10)(7)
    k= = =1. 6=2.0
    H (L+ W ) 2.6(10+ 7)

    uf= 0.91
    E LW
    N=
    n φ η uf
    where:
    k – Room Factor (Room Index)
    E – Illuminance, lux
    L – Length, meter
    W – Width, meter
    h – Height of Work Plane, meters
    n – Number of Lamps
    φ – Luminous Flux (Initial Lumens), lumens
    η – Luminaire Efficiency
    uf – Utilization Factor
    N – Number of Luminaires

    (750)(10)(7)
    N=
    (2.0)(900)(0. 81)(0. 91)

    N=39.57

    N=40 luminaires
    N (40 Luminaires) is now the minimum number of Lynx-DE Superia 13W/84 G24Q-1
    SLV. Since we want the illuminance to be dispersed uniformly, the quantity of luminaires will,
    however, not match the layout. Therefore, it is safe to recommend 40 luminaires, installed or
    distributed uniformly, in order to deliver the required minimum average illumination.
    Room 43-701 = 40 LUMINAIRES
    Room 43-702 = 40 LUMINAIRES
    The average illuminance will be:
    E LW
    N=
    n φ η uf
    1
    1 LW
    =
    E N n φ η uf
    N n φ η uf
    E=
    LW
    (40)(2.0)(900)(0. 81)(0. 91)
    E=
    (10)(7)
    E=758.16 lux
    Minimum Average Illuminance for Lecture Rooms= 750lux
    Design Average Illuminance= 758.16lux

    LUMINAIRE ARRANGEMENT (40 LUMINAIRES EACH ROOM)


    [INSERT PLASTAR SA LUMINAIRES NA LAYOUT]

    TOTAL LOAD:
    LRE1= 13W(40Luminaires) = 520W
    LRE2= 13W(40Luminaires) = 520W
    L= 2380W [total wattage for lighting design in Room 43-701 and 43-702]
    EVALUATION

    Room 43-701

    No. of Lamp/Luminaire Model Average 750lux Minimum


    Luminaires Illuminance Average Illuminance
    (Passed or Failed)
    Existing Design x Unknown 251.68 lux Failed

    New Proposed 40 Lynx-DE Superia 758.16 lux Passed


    Design 13W/84 G24Q-1 SLV

    Room 43-702

    No. of Lamp/Luminaire Model Average 750lux Minimum


    Luminaires Illuminance Average Illuminance
    (Passed or Failed)
    Existing Design x Unknown 258.08 lux Failed

    New Proposed 40 Lynx-DE Superia 758.16 lux Passed


    Design 13W/84 G24Q-1 SLV

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