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日光灯的发光效率是白炽灯的4倍,但一只日光灯管的售价是白炽灯的十几倍。如能延长日光灯的寿命,那末使用日光灯是合算的。日光灯管中的灯丝在冷态时电阻值很小,但通电后灯丝达到一定温度后,电阻值就达额定值。所以灯管点亮一瞬间,电流比正常值大很多倍,灯丝在大电流冲击下极易烧断。可以在启辉器中串联一只热
The luminous efficiency of fluorescent lamps is four times that of incandescent lamps, but the price of a fluorescent tube is ten times that of incandescent lamps. If you can extend the life of fluorescent lamps, then the use of fluorescent light is cost-effective. Fluorescent tubes in the cold filament resistance is very small, but after the filament reaches a certain temperature, the resistance on the rated value. So light the moment light, the current is many times larger than normal, the filament in the high current impact easily blown. You can connect a heat in the starter