How fluorescent lamps work

Fluorescent lamps are low-pressure gas discharge lamps. The glass tube is filled with an inert gas at lowpressure and a small quantity of mercury. The glass wall is coated with a phosphor. At the ends of the glass tube are pasted electrodes. When an electrical charge is passed between them the mercury vapor emits UV radiation. When the UV radiation hits the phosphor the phosphor emits visible light. The color can be varied for different applications by selecting different phosphor mixes.

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