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What is a Foot Candle?

April 26, 2017Arts candle foot Humanities photography Visual

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What is a Foot Candle?

3 Answers

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One lumen uniformly distributed over one square foot of surface. One lumen falling on one square foot of surface produces illumination of one- foot candle.

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http://en.wikipedia.org/wiki/Foot-candle The unit is defined as the amount of illumination the inside surface an imaginary 1-foot radius sphere would be receiving if there were a uniform point source of one candela in the exact center of the sphere. Alternatively, it can be defined as the illuminance on a 1-square foot surface of which there is a uniformly distributed flux of one lumen. This can be thought of as the amount of light that actually falls on a given surface. The foot-candle is equal to one lumen per square foot. Either that, or the latest hot foot wear. Sorry, couldn’t help myself!

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A unit of illuminance; equal to one lumen per square foot. U.S.