Below are possible answers for the crossword clue Unit of light.
5 letter answer(s) to unit 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
3 letter answer(s) to unit of light
RAY
(mathematics) a straight line extending from a point
a branch of an umbel or an umbelliform inflorescence
a column of light (as from a beacon)
a group of nearly parallel lines of electromagnetic radiation
any of the stiff bony spines in the fin of a fish
cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
emit as rays; "That tower rays a laser beam for miles across the sky"
expose to radiation; "irradiate food"
extend or spread outward from a center or focus or inward towards a center; "spokes radiate from the hub of the wheel"; "This plants radiate spines in all directions"
John Ray FRS (29 November 1627 – 17 January 1705) was an English naturalist widely regarded as one of the earliest of the English parson-naturalists.
His classification of plants in his Historia Plantarum, was an imp
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