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fluorescent lamp

fluo·res·cent lamp (plural fluo·res·cent lamps) or fluo·res·cent light (plural fluo·res·cent lights)


noun 
Definition:
 
type of electric lamp: an electric lamp containing a low pressure vapor, usually mercury, in a glass tube. Passing an electric current through it produces ultraviolet radiation that is converted into visible light by a coating inside the tube.

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