LUX

lux

A unit of measurement of the intensity of light. It is equal to the illumination of a surface one meter away from a single candle. See candela.

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lux

the derived SI unit of illumination equal to a luminous flux of 1 lumen per square metre. 1 lux is equivalent to 0.0929 foot-candle.

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lux [ləks]

(optics)

A unit of illumination, equal to the illumination on a surface 1 square meter in area on which there is a luminous flux of 1 lumen uniformly distributed, or the illumination on a surface all points of which are at a distance of 1 meter from a uniform point source of 1 candela. Symbolized lx. Also known as meter-candle.

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lux

The SI unit of illuminance equal to the illumination on a surface, all points of which are at a distance of 1 meter from a uniform point source of 1 candela; 1 lux is equal to 1 lumen per square meter (1 lm/m²).

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LUX 

a unit of illumination in the International System of Units. Symbols, Ik (Russian) and Ix (international). One lux is the illumination on a surface area of 1 sq m when the incident luminous flux of the radiation on it is equal to 1 lumen (1m); 1 Ix = 10^-4 phot (the unit of illumination in the cgs system of units).