Foot-candle (fc)

Definition: Standard unit of measure for illumination on a surface. The Average foot-candle level on a square surface is equal to the lumens striking the surface, divided by the area of the surface.

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Foot-candle – Wikipedia
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Convert lumen/foot² [lm/ft²] <—> foot-candle [ft·cd, fc] • Photometry — Light • Illuminance • Compact Calculator

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