foot-candle

or foot·can·dle

[ foot-kan-dl ]

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

foot-candle

noun

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

Word History and Origins

Origin of foot-candle¹

First recorded in 1905–10

Example Sentences

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

From Project Gutenberg