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Dusk-to-dawn photocell fixtures designed for screw-in incandescent bulbs contain a silicon chip that converts radiant energy into electrical current. The technology is generally incompatible with screw-in CFLs, shortening the life of the bulb. However, fixtures with built-in photocells that are designed to use only compact fluorescent lamps contain a delayed instant-on circuit to make them compatible with fluorescents.
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Can a compact fluorescent bulb be used in a dusk-to-dawn fixture?
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