Illuminance Calculation of Clean Room Project Lighting
This method is used to calculate the average illuminance
(Luminous flux of light source)(CU)(MF) Irradiated area area
Suitable for indoor, sports lighting
Utilization coefficient: 0.4 for general indoor use, 0.3 for sports
1. Illuminance distribution of lamps
2. Lamp efficiency
3. The relative position of the lamps in the irradiation area
4. Reflected light in the enclosed area
Maintenance factor MF=(LLD)X(LDD) generally takes 0.7～0.8
Example 1:
Indoor lighting, 4×5m room, using 9 sets of 3×36W grille lights
Average illuminance = total luminous flux of light source × CU × MF/area
＝(2500×3×9)×0.4×0.8÷4÷5
=1080 Lux
Conclusion: the average illuminance is above 1000Lux
Example 2:
Stadium lighting, 20×40m field,
Use POWRSPOT 1000W metal halide lamps 60 sets
Average illuminance = total luminous flux of light source × CU × MF/area
＝(105000×60)×0.3×0.8÷20÷40
=1890 Lux
Conclusion: the average level of illumination is above 1500Lux
Vertical illuminance above 1000Lux (depending on the installation location)
