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Lighting Level Calculator

Average footcandles from fixtures, lumens, and room area.

Inputs

Inputs and assumptions

Lamp lumens.

Fixtures in the space.

Floor area lit.

Fixture and room efficiency, typically 0.5 to 0.8.

Dirt and lamp depreciation, typically 0.7 to 0.9.

Result

Average illuminance
16.8 fc
Total lamp lumens
6,000 lm
Screening tool. Verify against the NEC as adopted locally, the AHJ, and nameplate data before acting.

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01 Lumens Per Room: What to Aim For in 2026

Workspace

Keep the assumptions with the result.

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