荧光灯用电激发水银蒸气。这会生成紫外线光而使得镀在灯管内壁上的磷涂层发光.
Fluorescent lights use electricity to excite mercury vapor. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow.
然而不用水银的LED在功效上已经可以与荧光灯相匹敌。
LEDs, however, contain no mercury and already rival fluorescents in efficiency.
荧光灯所存有的少量有害水银同样逃不过法案制定者的法眼。
The small amounts of poisonous mercury they contain are also in the sights of many lawmakers.
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