If you turn off your lights and the bulbs are still glowing a little bit, or one of the bulbs in your circuit doesn't want to shut all the way off, you have what we call a "ghost current" in your circuit. Why does the residue of electricity make LEDs glow and not other bulbs? When I turn the switch off, just the first strand of lights glows very faintly so I wonder is my switch used as the ground and the lights are finding ground at the tree they are hung at. LED lights flickering when switched off. I have three Blackstar 240W lights and I've just switched to flower a few days ago. The power switch is turned off. I had some LED strings doing the faint glow and looked at my controller power, This controller had a non polarized plug, took the plug and rotated it 180 degrees and the lights went out. when i turn the switch on the light come on as expected. LED lights glow dimly instead of turning off. when i turn the breaker on to that room all of my led lights glow when the switch is off. I took the light out and put a adapter to plug in an extension cord to run LED Christmas lights. Looked like the LEDs were turned on, but not all the way. I had a GE digital timer that I assumed was the cause of this problem. I recently added a room in my basement, all new wireing, lights, switches. The room is a guest room that typically doesn't have anything plugged into the outlets, so that could maybe explain why the lights glow there but not in the other room, which is occupied and has a bunch of stuff plugged in. It's not bright enough to see during the day but this morning it was very eerie. This low level induction from the live wire causes the bulb to glow. An incorrectly connected light switch or a switch with a night light can be responsible for flickering. the same bulb is operated by two different light switches. In some cases, an LED lamp may flicker even though the light switch is turned off. Luckily for your client you’re an LED professional (you’ve read this very blog post) and you know how to solve LED flickering issues.-Flickering is caused by a handful of different reasons, and once you’re aware of the causes it’s easy to identify and solve the issue. I've been checking each night when the lights are supposed to switch off and my LED lights are staying slightly on, even when the power timer has switched off. The reason for this can usually be found in the electrical wiring. Don’t know why I did this but I took one of those three prong adaptors converters to two prong and to my surprise the light fixture didn’t light up. The diodes in your LED bulb can use the very low level of current to create light (other bulbs can't do this). Why won't my LED lights turn off? 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