电话灯，简而言之就是可以接在固定电话插孔上，进行照明的灯。当座机通话的时候，电流会增大，电话灯就是利用这个原理，模仿座机通话，从而利用电流来照明，亮度相当于60W的台灯。
在外部电话公司联系，黑人和白人对可用于低压信号如电话灯。
On an outside phone company connection, the black and white pair may be used for low-voltage signals such as phone lights.
霓虹灯之于香港就相当于红色电话亭之于伦敦，雾之于旧金山。
Neon is to Hong Kong as red phone booths are to London and fog is to San Francisco.
克拉克女士打电话给史密斯先生，说教室的灯熄了。
Ms. Clark called Mr. Smith, saying the lights in the classroom had gone out.
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