Answer: flashbulbs

AnswerCrossword Clue
FLASHBULBSCamera attachments
flashbulbsFLASHBULB, an oxygen-filled electric bulb in which aluminium or other foil or filament may be fired to provide a brilliant flash
flashbulbsA light bulb that flashes in order to illuminate a photographic subject, of a type that is used only once