日光灯 Traditional form: 日光燈 Pinyin (reading): rìguāngdēng Definitions: fluorescent light Characters: 日 - sun; day; daytime 光 - light; bright, brilliant; only, merely 灯 - lamp, lantern, light Traditional characters: 日 - sun; day; daytime 光 - light; bright, brilliant; only, merely 燈 - lamp, lantern, light