Emergency Illumination Level Calculator

Calculate emergency illumination levels for egress paths per NFPA 101 Section 7.8 and IBC Section 1008

Input Parameters

Results

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Avg Illumination at Floor
fc
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Min Required (NFPA 101)
fc
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Max:Min Uniformity Ratio
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Fixtures Required
Note: Emergency illumination per NFPA 101 Section 7.8 and IBC Section 1008. Emergency lighting must operate for 90 minutes minimum (IBC 1008.3). Battery backup or generator required. Unit equipment per NFPA 101 7.9 or generator per NFPA 110.

Reference

NFPA 101 7.8.1.3: Emergency illumination requirements: Initial: 1.0 fc average, 0.1 fc minimum at floor After 90 min: 0.6 fc average, 0.06 fc minimum Max uniformity ratio: 40:1 IBC 1008.1: Min 1.0 fc at floor level E = (Lumens x CU x LLF) / Area CU ~0.40 for corridor, LLF = 0.65 emergency