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foot-candle

or foot·can·dle

[ foot-kan-dl ]
/ ˈfʊtˈkæn dl /
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noun Optics.
a unit of illuminance or illumination, equivalent to the illumination produced by a source of one candle at a distance of one foot and equal to one lumen incident per square foot. Abbreviation: FC

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Origin of foot-candle

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use foot-candle in a sentence

  • A lumen is the quantity of light which falls on one square foot if the intensity of illumination is one foot-candle.

    Artificial Light|M. Luckiesh

British Dictionary definitions for foot-candle

foot-candle

noun
a former unit of illumination, equal to one lumen per square foot or 10.764 lux
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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