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Lighting calculator (lumen-method average)

Explore how room area, total lumens, utilization, and light-loss factors relate — not an IES photometric design.

Editable assumption — not a universal room-type default.
Editable assumption (typically ≤ 1). 1.0 = initial / no maintenance loss.

— Enter dimensions, lumens, CU, and LLF.

  • 5 × 2 m · 1000 lm · CU 0.5 · LLF 1 → 50 lux
  • E_lux = (Φ × CU × LLF) / A_m²
  • 1 fc = 10.763910416709722 lux

Lumen-method average estimate only. Not point-by-point photometrics, not IES/LDT files, does not invent recommended lux levels, and does not certify workplace lighting or code compliance.

E_lux = (Φ × CU × LLF) / A_m²; fc = lux / 10.763910416709722. CU and LLF are your editable assumptions. Does not invent recommended lux levels or certify workplace lighting.