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Fluorescent
lamp
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A fluorescent lamp is a type of lamp that uses electricity to excite mercury
vapor in argon or neon gas, producing short-wave ultraviolet light. This light
then causes a phosphor to fluoresce, producing visible light.
Unlike incandescent lamps, fluorescent lamps always require a ballast to convert the mains power into power suitable for the lamp type. With fluorescent lamps designed to be compatible with standard light bulb sockets (named compact fluorescent light bulbs), the ballast is integrated with the lamp, usually inside the plastic housing between the socket connector and the glow tube.
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