From Longman Dictionary of Contemporary Englishnaked light/flame/sword etcnaked light/flame/sword etca light, flame etc that is not enclosed by a cover A naked light bulb dangled from the ceiling. → naked
Examples from the Corpus
naked light/flame/sword etc• He is like a naked light.• She likes to cover up the truth like she covers over the naked light.• This gives a double meaning to Blanche's hatred of naked light.• Both men were armed, each carrying a naked sword and dirk.• A very powerful naked light bulb hung from the office ceiling.• She turned, all flaxen and pink and white, haloed by the naked light bulbs round the mirror.• Obviously this is untrue - it is not the naked light that Blanche can not stand, it is the truth. 