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- Word comparison: lux vs. foot-candle
lux vs. foot-candle
noun
Optics.
plural
luces , luxes .a unit of illumination, equivalent to 0.0929 foot-candle and equal to the illumination produced by luminous flux of one lumen falling perpendicularly on a surface one meter square. lx
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. FC