Many people see the word magnetic ballasts are less likely to understand its specific role in the end what it is. When it works is that when the switch is closed circuit 220V 50HZ AC power is applied, current flows through the ballast and the lamp filament to filament heating starter (starter initially disconnected, due to the application of a greater than above 190V AC voltage, so that the gas bubbles arc jump starter within the discharge, so that deformation of the bimetal is heated, the two electrodes close together, forming a passage for filament heating), when the two electrodes starter against Together, the absence of arcing, the bimetal cooling, poles apart, due to the inductive ballast is inductive, when the circuit is suddenly interrupted, at both ends of the lamp will generate a pulse duration of about 1ms voltage of 600V-1500V, the exact voltage value depends on the type of the lamp, in the case of discharge, the voltage across the lamp immediately dropped, then the ballast lamp current on one hand, to limit the effect, on the other hand so that the power supply voltage is generated between the lamp and the operating current 55. -65. The phase, in order to maintain a secondary lamp starting voltage, the lamp can be a more stable job. Changzhou lamp factory, Changzhou ballast, Changzhou trigger www.czleneng.com