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Old 11-13-2016, 11:59 AM   #1
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Default LED still on with no power?

I'm sure this has been talked about already but I couldn't find anything.

I put in some Lotus knockoffs and the customer says one produces a little bit of light even when it's shut off. He can only see it at night. It isn't leakage through a dimmer because it's on normal 3 way switches. There are four fixtures on the switch leg and the others are okay.

Ideas?
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Old 11-13-2016, 12:02 PM   #2
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Lighted switches?
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Old 11-13-2016, 12:05 PM   #3
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Lighted switches?
Nope, just normal (P & S I think).
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Old 11-13-2016, 01:43 PM   #4
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Adjust your pot on the side of the LED compatible switch.
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Old 11-13-2016, 01:52 PM   #5
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Adjust your pot on the side of the LED compatible switch.
That would only be on a dimmer. Are dimmers in use $.99?

Moddy, I will reply to your PM when I get home.
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Old 11-13-2016, 01:54 PM   #6
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No dimmer.
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Old 11-13-2016, 01:58 PM   #7
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Quote:
Originally Posted by 99cents View Post
I'm sure this has been talked about already but I couldn't find anything.

I put in some Lotus knockoffs and the customer says one produces a little bit of light even when it's shut off. He can only see it at night. It isn't leakage through a dimmer because it's on normal 3 way switches. There are four fixtures on the switch leg and the others are okay.

Ideas?
Hey 99.,

I may know but the issue is how long it stay on after it shut off on the light ?

if it was on very dim for few minuites then it go out it may have some resdueal charge in there. unless it is near one of unswitched circuits sometime it can pick up inducted voltage which I know it is super rare but it can happened.
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Old 11-13-2016, 02:49 PM   #8
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Put a high impedance multimeter at the lamp socket with the switch turned off. If there's enough leakage to light a bulb, you'll see voltage.

I'm guessing you won't, and what he's seeing is the result of either capacitor bleed-down in the LED driver or some sort of phospheresence from the way the bulb makes white light. Either one of those will eventually go away after a few minutes.
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Old 11-13-2016, 07:15 PM   #9
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Change the switches.
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Old 11-20-2016, 07:20 PM   #10
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Speaking from experience:

Old (and worn-out) Pass & Seymour three-way switches can leak enough current to dimly illuminate an LED bulb. Also, if the fixture's driver circuit entails a capacitor, a dim after-glow is to be expected (especially from a budget-oriented design).
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Old 11-27-2016, 03:04 AM   #11
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You get the same thing with cfl.
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Old 11-27-2016, 10:03 PM   #12
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Most residential three ways will bleed through. Put your tick tracer up to a half switched receptacle and it will glow. Meter will read 75 volts.
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Old 12-03-2016, 05:34 AM   #13
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Shared neutral is the likely cause of this result. Had to figure this out myself once on recess lights in a bathroom that I installed a dimmer on and got a call the next day about LED trims that don't go off totally. Customer had changed bulbs to led trims. He said, no problem with the bulbs but led trims continue to glow very dim when turned off. Had him turn off breakers to isolate the issue. He told me a totally different circuit turned off the glow. That is when I concluded the shared neutral issue.......
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Old 12-03-2016, 10:14 AM   #14
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Just a followup - customer said the light faded out over time. These were Lotus knockoffs. Someone said that cheaper drivers can discharge over time. Maybe that's what's going on.

Lotus tells me they use a two stage driver. I have no idea what that means but I have never had this issue with Lotus.
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