Home>Discussions>ELECTRICAL & LIGHTING>Water on Lens of Fluorescent Ceiling Light
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Catmomtoo
Water on Lens of Fluorescent Ceiling Light

OK, this is just plain strange. We live in a 120 year old house in Colorado. Over the past couple of months we have been getting water building up on the inside of the lens of a fluorescent light ceiling fixture in our basement. We have looked everywhere for a leak and have found nothing. Also, we have found no moisture build up on anything around this light including on the light itself. We are thinking that this must be a condensation build up of some kind but we really don't understand how that could be. We have only been in the house for 2 years but this did not happen last winter when we had the same temp/moisture conditions in the basement that we have now. And it didn't happen at all during any other season. Any ideas? Thank you!

dj1
Re: Water on Lens of Fluorescent Ceiling Light

Is the condensation forming close to where the ballast is?

Catmomtoo
Re: Water on Lens of Fluorescent Ceiling Light

Yes, we think it is directly below the ballast.

dj1
Re: Water on Lens of Fluorescent Ceiling Light

You may have a faulty ballast. Now, if your fixture is the old fashion kind, with magnetic ballast, it could be hard to find a replacement. Replacing the whole fixture with a new electronic ballast one would make sense to me.

Catmomtoo
Re: Water on Lens of Fluorescent Ceiling Light

Thank you very much for your response! It probably is pretty old. Out of curiosity how would a faulty ballast cause condensation?

Re: Water on Lens of Fluorescent Ceiling Light

Moisture condenses in areas of high humidity on cold surfaces.

Is the light mounted where cold air can get to it. Is the light in a humid place, like a washroom?

dj1
Re: Water on Lens of Fluorescent Ceiling Light
Catmomtoo wrote:

Thank you very much for your response! It probably is pretty old. Out of curiosity how would a faulty ballast cause condensation?

If the worn out ballast produces excessive heat it can create condensation in a cold and/or humid basement.

Catmomtoo
Re: Water on Lens of Fluorescent Ceiling Light

Interesting...we are going to replace the light fixture (including ballast) and see if that helps. Thank you very much for your responses!

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