I pulled the pool light to clean out the niche and found the light housing a quarter of the way filled with water. The light is a pentair 120 volt with a flood light in it. The niche is plastic.
Taking the lens off the light I noticed that the edges of the lamp housing and the front retainer ring were corroded/etched in spots. I switched to a salt system last year and I'm wondering if there is some sort of galvanic action causing the etching? I'm wondewring if anyone else has this problem and if the etching will continue and allow a leak past the lens gasket. I'm thinking of just disconnecting the electric to the light and putting the housing back in the niche.