Calculadora de Layout de Iluminação — Formula
## Lumen Method for Lighting Design
**N = (Area x FC) / (Lumens per Fixture x CU x MF)**
Where FC is the target foot-candle level, CU is the coefficient of utilization (depends on room shape and reflectance), and MF is the maintenance factor (accounts for dirt and lamp aging).
**N = (Area x FC) / (Lumens per Fixture x CU x MF)**
Where FC is the target foot-candle level, CU is the coefficient of utilization (depends on room shape and reflectance), and MF is the maintenance factor (accounts for dirt and lamp aging).
Exemplo Resolvido
20x15 ft office at 50 fc using 3,200-lumen fixtures, CU=0.6, MF=0.8.
- Area = 20 x 15 = 300 sq ft
- Lumens needed = 300 x 50 = 15,000 lm
- Effective per fixture = 3200 x 0.6 x 0.8 = 1,536 lm
- Fixtures = 15,000 / 1,536 = 9.77, round up to 10