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Old 05-29-2010, 01:42 PM   #1
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Floresent Light Flickering


I have a floresent light that flickers when its turned off. I only notice it late at night. It is almost a "Northern Lights" type of thing. I have switched porlarity of the the input wires, changed bulbs and changed the starter, It still has the same problem. Any ideas? It is weird. dorf dude...
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Old 05-29-2010, 04:48 PM   #2
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What kind of switch controls this light? It's not on a dimmer, is it?
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Old 05-29-2010, 10:56 PM   #3
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Not on a dimmer switch. During the day with it off you don't see it. Only at night with every other light off and dark outside then it is a faint flicker. I do understand electricity, I have a degree in electronics, this is weird. What would cause this? I've seen videos of floresent bulbs lighting up in the presence of high voltage power lines. This is just straight household power. Thanks for the input, dorf dude...
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Old 05-29-2010, 11:48 PM   #4
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I just wondering did someone add a commuation tower near your home ? I may have a far featched idea seems sometime mircowaves power can cause some flourscent lumiaire to flicker a little.

If I recall that you have triphase supply if so try to swap one of the phases sometime it will stop the flicker.

Any chance did you have timer or motion sensor or lighted toggle or rocker switch { the light on switch handle will glow when it switched off }?


To the rest of readers keep in your mind shumakerscott is from Germany the voltage is 240 volt L-N or 400 or 415 volts Line to Line and it will be on 50 HZ supply as well { it the same in France where I am now }

Merci,Marc
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Old 05-30-2010, 11:37 AM   #5
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Thanks for the reply Marc but no lighted switch, no transmission tower. I can't go switching things in the electric box because I'm in a rental. Do you have time to drive over for a day? Your welcome to stay. dorf dude...
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Old 05-30-2010, 12:47 PM   #6
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I didn't think that induced current or phantom voltage would be enough to light up a compact fluorescent lamp but maybe it is enough.

If you have a 3 way switch arrangement with a fairly long run between the switches, or a fairly long switch loop (power enters at light fixture and another cable goes down to the switch, then there could be measurable current getting through the circuit where juxtaposed live and dead (switched off) conductors act as a capacitor.

Or maybe the circuitry in the lamp ballast allows phantom current to build up a charge and every now and then the charge discharges through the tube or bulb.
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Old 05-31-2010, 01:24 AM   #7
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Quote:
Originally Posted by shumakerscott View Post
Thanks for the reply Marc but no lighted switch, no transmission tower. I can't go switching things in the electric box because I'm in a rental. Do you have time to drive over for a day? Your welcome to stay. dorf dude...
Thanks for asking me to come over however ., I am working overtime for next few days if you still have issue let me know I will work around my shedule.

Your European Freind.,
Marc
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Old 05-31-2010, 03:51 AM   #8
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That wasn't a work invitation. Just a check out the project and drink a beer. dorf dude...
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Old 05-31-2010, 01:49 PM   #9
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Opps sorry for misunderstood and sure I will let you know ahead of the time when I come over and see your place.

Merci,Marc
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