as long as water doesnt get to the ceramic socket it should be fine. these lights do not get very hot and even after they are on for hours, im still able to put my hand on the light. im referring to the floodlight version though. i have even dunked the lights into the tank water to wash off the saltcreep. now i have noticed a crack in the reflector, but i dont know if it came like that or if i did it. i sealed it back up and pretend its not there now.