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Discussion Starter · #1 ·
My kitchen lights often will "dim" themselves for no apparent reason. There is no correlation between the time of day, other appliances in operation, or how long the light has been on.

They will suddenly dim themselves, and later will re-energize themselves. The wattage maximum of the appliance is 100 watts, and the light bulbs are under th wattage maximum.

What can I do?!

I've uploaded a video on YouTube to show you exactly what happens.
HELP!

http://www.youtube.com/watch?v=Mbs001drFwc
 

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DIY'r
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What kind of switch do you have operating those lights?

I'm assuming this doesn't happen elsewhere in your house, but are there receptacles where you can plug in a lamp or other lights on that circuit? And if so, do you see the same behavior there?
 

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Ah, I didn't realize it was low voltage.

My guess would be that the problem is in the fixture. Either bad transformer or a bad bulb/loose connection. I'm sure you tried, but if you shake the fixture a little, do you see any dimming?

In your shoes I'd probably temporarily replace it with a standard incandescent fixture and see if it dims to rule out the building's wiring.
 

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Discussion Starter · #5 ·
Before this was installed there was a fluorescent light fixture in its place for years, and never an issue. Is it safe to say its a faulty unit?
 

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Transformer or wiring issue at the fixture. I agree, replace with a standard 120V incandescent fixture to see if the dimming still occurs. If not then the LV fixture is faulty.
 

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It's only a guess that it's the fixture, so if it's going to cost you money to replace you should do some extra testing first (if it's new and you can exchange it then all the better though).

I meant to ask; did this start right after you put in the new fixture, or did it just randomly start later?

It could also be that when the new fixture was installed there's a loose connection in the junction box in the ceiling. Couldn't hurt to check there also.
 

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Discussion Starter · #8 ·
This occurred within minutes of installing the new fixture. Initially there was more than 100 watts, more like 125, and we thought that was the problem. However after we removed some of the components we discovered that in fact it was the unit itself. I would have gladly returned it, however this was purchased at least nine months ago and I no longer have the receipt.
 

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If the three lights all share one power supply,
Then the fault could be in the power supply,
Is it a iron core transformer?
or an electronic type supply ?
Replace it !
If it is electronic type,
and you are electronic type of person,
Then open it up and check it,
A lot of times it is simple fault like broken solder joint.
If it is then it is easily fixed.
But if you not electronic person, then buy new one.
I have fixed plenty of electronic supplies.
 
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