Reason: The power supply is not completely cut off, so a little current flows through the bulb, resulting in the appearance of corners, but most lamps will disappear after a period of time, which is acceptable. However, if the corner does not disappear, it is the leakage of the bulb and the leakage of the base, which leads to the emergence of the corner. Another situation is the appearance of induced electricity.

Solution:

1, cut off the fire line

The leakage current of the corner lamp will only appear when the switch is not completely cut off. You can remove the switch and check whether the switch cuts off the live wire. If it is not cut off, make adjustments to ensure that the fire line is completely cut off. If possible, it is best to cut off all live and neutral wires.

2. Add capacitors at both ends of the LED lamp.

If the method 1 doesn't work, it's that induced electricity leads to afterlight. The solution is to connect small capacitors in parallel at both ends of the LED lamp, which can effectively protect the LED from stroboscopic or residual light.

3. Replace lamps and lanterns

If the LED always has residual light, it is necessary to consider changing the lamp and replacing the LED lamp with an ordinary lamp, so as to solve the problem of residual light.

4. Replace the switch. Some modifications are more scientific, using wireless or touch switches. Sometimes this switch can't be completely cut off. It is suggested to directly switch to ordinary switch to avoid the small current caused by intelligent switch.