light unit

Definitions of light unit

n a measure of the visible electromagnetic radiation

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illumination unit
a measure of illumination
luminance unit
a measure of luminance
luminous flux unit
a measure of luminous flux per unit area
candlepower unit, luminous intensity unit
a measure of luminous intensity
the intensity of light falling on a photographic film or plate
a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle
L, lambert
a cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter
lux, lx
a unit of illumination equal to 1 lumen per square meter; 0.0929 foot candle
a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux
a luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source
foot-lambert, ft-L
a former luminance unit equal to one lumen per square foot
lm, lumen
a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions
candela, candle, cd, standard candle
the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin
international candle
a former international unit of luminous intensity; now replaced by the candela
Type of:
electromagnetic unit, emu
any of various systems of units for measuring electricity and magnetism

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