The reason for this can usually be found in the electrical wiring. The LED shop light fixture has a glow to it. I have three Blackstar 240W lights and I've just switched to flower a few days ago. LED lights glow dimly instead of turning off. When a two-way switch is used to operate LED lights then the glowing of LED lights can be noticed more particularly. I suspect that timers allow a small amount of voltage through even when they are set to the off position because my LED Christmas lights (~1200) are glowing faintly. 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. the same bulb is operated by two different light switches. LED bulbs create light with the current of a very low level due to the diodes in them which are not available in other bulbs. 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. Why does the residue of electricity make LEDs glow and not other bulbs? Jump to Latest Follow 1 - 20 of 27 Posts. 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. I had a GE digital timer that I assumed was the cause of this problem. In some cases, an LED lamp may flicker even though the light switch is turned off. I recently added a room in my basement, all new wireing, lights, switches. The power switch is turned off. 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. Looked like the LEDs were turned on, but not all the way. It's not bright enough to see during the day but this morning it was very eerie. An incorrectly connected light switch or a switch with a night light can be responsible for flickering. when i turn the breaker on to that room all of my led lights glow when the switch is off. LED lights flickering when switched off. Why won't my LED lights turn off? 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. The diodes in your LED bulb can use the very low level of current to create light (other bulbs can't do this). Glowing LEDs can be particularly noticeable when light bulbs are fitted with two-way switches, i.e. I took the light out and put a adapter to plug in an extension cord to run LED Christmas lights. 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. This low level induction from the live wire causes the bulb to glow. when i turn the switch on the light come on as expected. Noticeable when light bulbs are fitted with two-way switches, i.e have three 240W. When a two-way switch is off that room all of my LED lights glow when the switch on the switch. Flicker even though the light out and put a adapter to plug in an extension cord to run LED lights! On, but not all the way fixture has a glow to.. To that room all of my LED lights can be noticed more particularly adapter to in... 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