Water and Algae in Light Fixture

lmc21

New member
Apr 29, 2019
4
East Texas
Water and algae are inside the light fixture, behind the cover where the bulb is, and the bulb is no longer working. Is there a danger? How do I get it clean and then seal it so it does not happen anymore??
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Welcome to TFP! :wave: Water is designed to flow behind the light bulb into that "niche" you are referring to. The water helps to keep the bulb cool and actually flows up through the conduit back to the equipment pad equal to the pool water level. Periodically, owners have to remove the light fixture and clean-out that niche well because the certainly can harbor algae. Sometimes leaving te bulb out and on teh pool deck for a day or two makes a big difference.

As long as the break to the bulb is off, there is no danger. The bulb is just filling the cavity.
 

lmc21

New member
Apr 29, 2019
4
East Texas
Thanks for the welcome and the quick reply! I'm not sure I understand yet -- is the niche the "hole" in the pool wall or the metal part of the light fixture that houses the bulb? It's the latter that has water. I will post a photo.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
So if water got inside the actual light fixture, the bulb is probably bad. Depending on your light fixture, you may be able to replace the fixture seal and bulb. For now though, just make sure to cut power off to the light.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
With power cut to the fixture, you are safe. With a standard incondescent light fixture, you may need to run the wire from the new fixture back to the equipment pad like in this video IF the entire fixture is determined to be bad:

If you are able to simply replace the bulb, it should look more like this video:
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
I'm not sure how I would determine whether the whole fixture is bad or not.
Hopefully there is a label or part number info on the back of the fixture. Take a look at this page:
 

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