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Lighting Lumen Method Calculator

Fixture count from foot-candles, area, CU, and light-loss factor. 6 inputs, 2 outputs.

Inputs

Room

Room length.

Room width.

Office task lighting is often 30-50 fc.

Fixture

Fixture/luminaire CU from photometrics.

Dirt, lumen depreciation, ballast.

Fixture rated lumens.

Result

Fixtures needed
Waiting for calculation.
Required lumens
Waiting for calculation.
Screening calculation only. Verify against NEC articles cited on the page and the equipment nameplate; the authority having jurisdiction governs.

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Workspace

Keep the assumptions with the result.

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