The main reason is the failure of the filtering capacitor
1. The LED beads do not match the power supply of the LED driver. Usually, a single 1W lamp bead can withstand a current of 280-300ma and a voltage of 3.0-3.4v. If the power of the LED chip is insufficient, it will cause the light source to flicker. Phenomenon: If the current is too high, the lamp beads will turn on and off if they cannot withstand it. In severe cases, the gold or copper wires inside the lamp beads will be burned off, causing the lamp beads to not light up.
2. It is possible that the driver power supply is faulty, as long as it is replaced with another good driver power supply, it will not flash.
3. If the driver has an over temperature protection function, but the material heat dissipation performance of the lamp cannot meet the requirements, the over temperature protection of the driver will also have a flashing and extinguishing phenomenon when it starts working. For example, if the shell of a 20W floodlight is used to assemble a 30W lamp, the heat dissipation work is not done well, and this will happen.
4. If outdoor lighting fixtures also have a flicker on/off phenomenon, it means that the lighting fixtures have been flooded. The consequence is that if it flickers, it will not light up. The LED and driver are broken. If the waterproof of the driver is done well, it’s just that the LED is broken and the light source needs to be replaced.
Solution for LED shaped lights flashing:
If the electric light flashes after turning off, the first thing to confirm is the wiring problem. The most likely problem is the zero line controlled by the switch. In this case, please correct it in a timely manner to avoid danger. The correct method is to control the live wire with a switch and connect the neutral wire to the light.
If there is no problem with the circuit, it is possible that the LED light has generated self induced current. A simple method is to purchase a 220V relay and connect the coil in series to the light to solve the problem.