What is the reason why the ceiling light in the living room at home flashes when it is turned on on

Because in electronic ballasts, when the light is turned off and the power is cut off, inductive components such as the Erliu coil will generate a large self-induced electromotive force, which makes the lamp strong and weak to flicker until it goes out.

Whether it is an electronic ballast or an iron core inductance ballast, as long as the switch turns off the live wire, no matter how it is connected, there can be no bright light, otherwise it is the "second perpetual motion machine".

Now the light will flash when the light is turned off, one is that the internal insulation of the switch is poor, and there is still leakage current when the light is turned off; The second is that the fire line is not turned off, and the zero line is turned off. In this way, the alternating current on the lamp will generate a weak leakage current through the distributed capacitance, insulation resistance, etc., so that the lamp will flash.

The correct approach is: 1. Connect the live wire and zero line as required. 2. Check the insulation of the conductive part of the device, if it can meet the above requirements, it can be solved.

The switch may be larger in terms of water inlet, and the water inlet switch in the interface is not in the water lamp, and there is no power on the lamp. If you exclude the switch from water, it means that the switch of your home is connected to the zero line, and the water leaks into the lamp head on rainy days, and the light interface and the wall or the wet eaves are conductive, which is equivalent to the fire wire of the electric lamp to the ground, and the electric light will also be on in this case!

Thank you for the trouble to adopt!