延长走廊灯泡寿命简法

A simple method to lengthen the life-span of the bulbs in corridor

采用整流二极管降压,使灯泡在脉动电压为50Hz的状态下工作,可延长灯泡寿命十余倍。

Rectifying diode to step down the voltage and making the bulbs in corridor work in 50 Hz pulsant voltage, we can lengthen the life-span of the bulbs to more than ten times.