Lighting Level (Lux) Calculator

Calculate required number of luminaires using the lumen method for interior lighting design per IES standards.

Office: 300-500, Retail: 300-750, Warehouse: 100-200 lux.
lux
Floor area of the room.
m²
Total lumens per luminaire. LED panel: 3000-5000, Troffer: 4000-6000.
lm
Depends on room reflectances and geometry. Typical: 0.50-0.80.
Clean: 0.80, Average: 0.70, Dirty: 0.60.

Results

Total Lumens Required-lm
Number of Luminaires-
Lighting Power Density-W/m²
Actual Illuminance-lux
References: IES Handbook — Lighting; ASHRAE 90.1