Foot candle

foot-candle

[foot-kan-dl]
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
Also, footcandle.


Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
foot-candle
 
n
a former unit of illumination, equal to one lumen per square foot or 10.764 lux

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

foot-candle n.
A unit of measure of the intensity of light falling on a surface equal to 1 lumen per square foot. It has been replaced in the International System by the candela (1 lumen per square meter).

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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