"Paul" wrote in message
...
I have a small pond and put in an underwater light last year(50W, Alpine).
It worked great for some months and then it stopped working. I went to
replace the bulb and found that water had leaked into its housing. What
can
cause that? Is Alpine a defective product?


The seals eventually fail, water pressure pushes inward, when the light is
on, the hot air pushes outwards. Once water gets inside the contact points
quickly corrode and the whole fixture needs to be replaced. Make a pond
light out of a car headlamp, and never have to worry again.

-S