illuminant

something that provides illumination <at the time, a spermaceti candle was the brightest indoor illuminant available> Synonyms beacon, light, lampRelated Words arc lamp (also arc light), candelabra, candelabrum, candle, chandelier, dark lantern, electric, flare, flash, flashbulb, flashcube, flashlight, floodlight, fluorescent lamp, gaslight, gasolier, girandole, headlight, incandescent lamp, klieg light (or kleig light), lantern, light bulb, lighthouse, lighting, sconce, spotlight, streetlight, sun lamp