Room Lux Calculation

 Room Lux Calculation

The basic lighting calculation is:

✔E= N × F × UF × MF ÷ A

Where:

✔️ E = Required illuminance (lux)

✔️N = Number of lamps/luminaires

✔️F = Lumens per lamp/luminaire

✔️UF = Utilization Factor

✔️MF = Maintenance Factor

✔️A = Room area (m²)

✅ Example

Room size = 6 m × 5 m

Area:

✔️A= 6 × 5=30m^2

Required illuminance = 300 lux

Assume:

✔️LED panel = 3,600 lm

✔️UF = 0.7

✔️MF = 0.8

✅ Required number of lights:

✔️N = E × A ÷ F × UF × MF

✔️N= 300 × 30 ÷ 3600 × 0.7 × 0.8

✔️ N = 4.46

So, select 5 LED panels of 3,600 lumens.

Practical point: Actual design should also consider mounting height, room reflectance, luminaire spacing, glare, and the required lux level for the room's use.

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