I've always had problems with water leaks in light fixtures, even with brand new replacement lights (Sta-Rite Sunlite). After a few months of use I see a little water behind the lens. I've tried wrapping a little teflon tape around the rubber lens gasket before mating it with the metal shell, and then wrapping some more around the gasket & shell before clamping the seal over the whole thing, and that just slowed the rate of infiltration but didn't stop it. I still have to drain the water out of the lights at least once a year. Is this normal? Are there better ways of sealing light fixtures? Could the water be coming in at the cord rather than at the lens gasket? Is there a way to seal that?