Function of ballast

- Nov 18, 2020-

Start the ballast to generate high voltage. Under the action of the excitation circuit, the Mercury and metal halide vapor in the bulb are excited to generate arc discharge. When the arc discharge is generated, the resistance of the bulb decreases rapidly, A large current may be generated to burn the bulb. The second function of the ballast is to limit the current through the bulb to the optimal value.