foot-candle

American  

[foot-kan-dl] / ˈfʊtˈkæn dl /

Or footcandle

noun

Optics.

1. 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. FC

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foot-candle British  

noun

1. a former unit of illumination, equal to one lumen per square foot or 10.764 lux

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Etymology

Origin of foot-candle

First recorded in 1905–10

Compare meaning

How does foot-candle compare to similar and commonly confused words? Explore the most common comparisons:

• lux vs. foot-candle

Example Sentences

If a source of light has a luminous intensity of one candle in all directions, the illumination at a distance of one foot in any direction is said to be a foot-candle.

From Artificial Light Its Influence upon Civilization by Luckiesh, Matthew

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

From Artificial Light Its Influence upon Civilization by Luckiesh, Matthew