Below are possible answers for the crossword clue Measure of light.
5 letter answer(s) to measure of light
LUMEN
a cavity or passage in a tubular organ; "the lumen of the intestine"
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
Other crossword clues with similar answers to 'Measure of light'