There are a few ways that a pool light could possibly leak however there is one very common way that accounts for most of the leaking pool lights out there and this relates specifically to the cord seal where the electrical conduit connects to the back side of the light niche.
Pool light leaking at cord.
Pool light conduit is or 1 gray pvc pipe running under the deck.
What the pool guy will replace is the entire fixture.
Inground swimming pool lights are the first line of safety in illuminating the pool.
With every one out of five fixtures leaking the call back percentage is just too high so pool tech s refuse to replace a pool light bulb.
In the case of leaking swimming pool lights you can use a big handful of pool putty about half a package in order to build a cone around the point where the light cord is placed.
Because the point where the pipe connects to the light niche is not sealed water can enter the pipe.
Slide in cord and push into conduit.
The conduit immediately cracks or becomes separated from the niche.
This is a black rubber plug that will fit around the wire of the pool light and into the inner part of the electrical conduit and then can be pressed it firmly to seal the niche.
Eliminate water leaks at pool light forever.
The next method you can do to repair the leaking pool light niche is to buy something called a pool light niche cord leak plug.
The water level may be below the skimmer bottom or the return line but if it stopped leaking when it reached the light that is a red flag.
Never mess with putty or silicon again use on any underwater light niche where leaking is a problem.
After mark up and labor a traditional halogen white light fixture is about 500 led lights are much more expensive.