What's wrong with turning on and off the lights with dual control? Ask for help.

According to your description, it is judged that it is the low light phenomenon caused by induced electricity, not the circuit wiring error.

This situation is usually more obvious in rainy and humid weather. This kind of weather usually does not consume electricity, and the electric meter will not count, which basically has no effect on the life of the lamp and can be left alone.

If you have to deal with it, you can install an AC 220V micro relay at the lamp end, and choose a double-contact one, which can fundamentally eliminate the dim light. See the diagram below for the circuit principle.