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nounthe quality of being luminous; emitting or reflecting lighttype of:
Definition that contains luminance
- nit a luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source
- luminance unit a measure of luminance
- footcandle a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle
- ft-l a former luminance unit equal to one lumen per square foot
- foot-lambert a former luminance unit equal to one lumen per square foot