Weird shop LED light issue
#2913186
04/21/21 10:03 PM
04/21/21 10:03 PM
|
Joined: Jan 2003
Posts: 28,068 Irving, TX
feets
OP
Senior Management
|
OP
Senior Management
Joined: Jan 2003
Posts: 28,068
Irving, TX
|
I've got a series of 8' long LED lights across the ceiling in my garage. They're plugged into ceiling mounted outlets and switched by the door.They work fine.
I moved one of them into my shop. It gets used for extra task lighting. There is a switched outlet mounted high on the wall for the window AC unit. A power strip is plugged into that and is mounted down near the floor. An extension cord runs from there to my bench where it powers that light. Nothing else is plugged into that circuit at this time. Even the window unit is unplugged.
I have not used that light in three days.
Tonight, I walked into the darkened shop and noticed a faint glow from the light. The factory installed switch on the light is turned off. The switched wall outlet is turned off. The light still glows.
Outlet on. Light on. Light is on. Outlet on. Light off. Light is off. Outlet off. Light on. Light is off. Outlet off. Light off. Light glows dimly.
Any idea what is going on?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
|
|
|
Re: Weird shop LED light issue
[Re: moparjim79]
#2913281
04/22/21 07:24 AM
04/22/21 07:24 AM
|
Joined: Feb 2007
Posts: 5,468 Michigan
oldjonny
Don't argue with me.
|
Don't argue with me.
Joined: Feb 2007
Posts: 5,468
Michigan
|
120VAC only switches one leg. There is enough leakage (and the bulbs are also usually 'cheap') that they will glow.
From an article:
Residual Electricity
When a low current level is still present within your LEDs diode, the bulb will pick it up and convert it into lighting.
This phenomenon is called residual electricity. LEDs are most likely to pick up residual electricity due to their high efficiency.
High-Resistance
Sometimes the wiring is at fault. If the neutral wire is not earthed or is at very high resistance, it can leak a small current to the bulb. This faintly powers the bulbs continuously.
Fancy Switches
Some switches have features like an indicator light, motion detection, timer, etc. These need some power to be on stand-by.
Due to the wiring, LEDs can draw on this small power and still stay on faintly even when you’ve flipped the switch off.
Operating Temperature
The filament of an incandescent bulb gets extremely hot to give off white-hot light.
When you turn off the power to the bulb, the filament takes a few seconds to start cooling down. So it continues to glow slightly as the filament is still quite hot for a few seconds.
Never, ever argue with an IDIOT. They will drag you to their level and then beat you with their years of experience
|
|
|
Re: Weird shop LED light issue
[Re: oldjonny]
#2914722
04/25/21 12:15 PM
04/25/21 12:15 PM
|
Joined: Jan 2003
Posts: 7,541 Albany, NY
67SATisfaction
The member whose name is actually Art
|
The member whose name is actually Art
Joined: Jan 2003
Posts: 7,541
Albany, NY
|
120VAC only switches one leg. There is enough leakage (and the bulbs are also usually 'cheap') that they will glow.
From an article:
Residual Electricity
When a low current level is still present within your LEDs diode, the bulb will pick it up and convert it into lighting. Some of the household bulbs we have replaced with LED's now give us 'nightlights' which is convenient for the kids.. - Art
65 Satellite hardtop 361/4bbl console 727 2.76 67 Satellite convert 383/2bbl column 727 3.23 67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd 67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd 71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd 82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle 75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF 77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF 07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
|
|
|
Re: Weird shop LED light issue
[Re: 67SATisfaction]
#2914755
04/25/21 01:21 PM
04/25/21 01:21 PM
|
Joined: Sep 2003
Posts: 19,485 north of coder
moparx
"Butt Crack Bob"
|
"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,485
north of coder
|
i replaced all the four foot, four tube florescent bulb lights in my garage with two tube/strip LED lights, using the four tube light fixture tin work. [30 lights total] it's like daylight now ! when i shut them off, they do "glow" slightly as has been mentioned. i used 5k or 6k rated LEDs, i forget which. i want to replace the four tube fluorescent bulb fixture in the kitchen, which has a suspended ceiling. when i went shopping for a drop in replacement, i found lots of "warm white" units. what is the difference between "warm white" and the 5 or 6k units i have in the garage ?
|
|
|
Re: Weird shop LED light issue
[Re: feets]
#2916798
04/30/21 12:35 AM
04/30/21 12:35 AM
|
Joined: Jan 2003
Posts: 2,271 central IL reg Nov 18, 1999
Stroker
top fuel
|
top fuel
Joined: Jan 2003
Posts: 2,271
central IL reg Nov 18, 1999
|
I have an outside light on a grain bin that does that. An electrician explained it like a previous poster, that it takes such a small amount of juice that it's running off what's bypassing the switch. Since I don't use mine year round, I turn off the breaker.
|
|
|
Re: Weird shop LED light issue
[Re: Stroker]
#2916807
04/30/21 01:18 AM
04/30/21 01:18 AM
|
Joined: Dec 2005
Posts: 11,621 Fulton County, PA
CMcAllister
Mr. Helpful
|
Mr. Helpful
Joined: Dec 2005
Posts: 11,621
Fulton County, PA
|
I have 96 4' T8s on the ceiling of my shop. I'd like to go LED, but Holy $$$$, Batman.
Thought about doing half and half.
If the results don't match the theory, change the theory.
|
|
|
|
|