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Flashbulbs are small, single-use bulbs that produce a bright flash of light when ignited. They are commonly used in photography to provide additional lighting for taking pictures in low-light situations. Flashbulbs are typically filled with a combustible material that produces a flash of light when ignited by an electric current. They are designed to be disposable after use, as the flash is produced by a one-time chemical reaction within the bulb. Flashbulbs come in various shapes and sizes to fit different types of cameras and lighting needs.