Average illumination calculation 1/ Average illuminance by capacity estimation: Eav=(ФxNxCUxMK)÷A
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Eav=average illumination Ф= luminous flux CU=use factor MK=maintenance factor N=number of luminaires A=area (m2)
2/ The average illumination design office of an office:
A/design conditions:
The office is 18.2 meters long, 10.8 meters wide, 2.8 meters high on the ceiling, 0.85 meters high on the table top, a factor of 0.7, a maintenance factor of 0.8, and 33 sets of lamps. What is the average illuminance in the office?
B/Luminaire Solutions:
The luminaire adopts Shi Guang Di Ni Te DiNiT 2X55W anti-glare fluorescent lamps, luminous flux 3000Lm, color temperature 3000K, and color rendering Ra90 or more.
According to the formula listed in 1/, find:
Eav = (33 sets of X6000LmX0.7X0.8) ÷ (18.2 meters X 10.8 meters)
Eav=110880.00÷196.56 m2
Eav=564.10Lx
C/Notes:
Lighting design must require accurate use of the coefficient, otherwise there will be a large deviation, affecting the size of the utilization factor, mainly the following factors:
* Light distribution curve of lamps * Light output ratio of lamps * Indoor reflectance, such as ceiling, wall, work tabletop, etc. * The indoor area index with complex size of area lighting design requires professional lighting design software for computer simulation calculation.