Emergency Lighting Calculator

Calculate emergency lighting battery capacity, luminaire count, and duration per NEC 700/NFPA 101.

Total emergency/exit lighting fixtures.
LED emergency: 5-15W each.
W
NEC 700: 90 min minimum for emergency systems.
minutes
Battery system voltage.
V
Lead-acid: 80%, NiCd: 80%.
%

Results

Total Power Load-W
Required Battery Capacity-Ah
Required Energy-Wh
Discharge Current-A
References: NEC Article 700/701; NFPA 101 — Life Safety Code