Lumen
Related Definitions
[n] a cavity or passage in a tubular organ; "the lumen of the intestine"
[n] 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
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Related Terms
ASA scale, bougie decimale, British candle, candle, candle lumen, candle power, candle-foot, candle-hour, candle-meter, decimal candle, exposure meter, flux, foot-candle, Hefner candle, intensity, international candle, lamp-hour, light, light meter, light