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Some lamps are equipped with coils (such as low-frequency filters) or filter capacitors with large inductance, and when the lamp circuit is suddenly turned off, the power off self-inductance will occur, and the lamp will flash for a while. Rest assured that there is no damage to the fixtures. Good luck!
Poor contact. If your home is not like this - other appliances, it is not always a concern. Just a light and you can: >>>More
Your fault phenomenon is caused by the intermittent poor contact of the line. >>>More
Probably your switch didn't control the live wire? Or is the zero line also closed?
Whether the living room balcony is better to make a wardrobe or a desk, it is recommended to find a professional designer to help you design. >>>More
The contact of the wire end is unstable, open the box and close the main switch, and divide the head of the line to see if it is firm!