Calculatorism

Lumen Method Calculator

Compute average illuminance E = NΦ·CU·MF / A.

Input Data

Input Luminaires N.
Input Lumens per lamp Φ.
lm
Input Utilization CU.
Input Maintenance MF.
Input Area A.
m²

Results

288lx
E = N·Φ·CU·MF / A.

At a glance:Lumen Method Calculator: enter parameters to compute results; complements related calculators.

Formula

E = N·Φ·CU·MF / A.

How to Use

  1. Enter luminaire count, per-lamp lumens, CU, MF and area.
  2. It returns average illuminance.

Case Studies

10×3000 lm, CU=0.6, MF=0.8, A=50 → E=288 lx

E = 10·3000·0.6·0.8/50 = 288 lx.

FAQ

What is CU?

Fraction of lamp flux reaching the work plane; depends on room shape and reflectance.

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Lumen Method Calculator（/light/lumen-method）。