The effect of the Qihui process on the life of the lamp: the electronic ballast is turned on after the preheating of the filament in the case of low temperature or low voltage; the influence of grid voltage fluctuation on the life of the lamp: electronic ballast can do The lamp current is constant within the grid voltage range of 135V-250V, so that the lamp is always working in a good state, thereby greatly improving the service life of the lamp.