I have a very old house with unknown wiring, two ceiling light fixtures in the living room, and a very strange problem with the lighting in these fixtures:
When I turn on the first LED ceiling light via its pull-chain switch it works as expected. But when I turn on the other LED ceiling light via its wall switch, the second light turns on as expected -- but at the same time the first light gets BRIGHTER.
If anything, I would expect that turning on the second light would cause the first light to get dimmer (due to the added resistance) but this seems to be incorrect. Can anyone tell me what might be going on here?