I removed the light fixture housing and replaced the bulb and installed a new rubber gasket. I reinstalled the light housing into the niche (below water) per the specific instructions and reinstalled the single screw. When I flipped the switch the light bulb came on for about 3 seconds before it turned off. I walked away and tried it again later and it did the same thing later on. I again removed the housing from the niche and brought the bulb inside to see if it was still good. The bulb worked fine inside a different light bulb socket in my garage. I again reinstalled the bulb in the light housing and reinstalled the housing in the niche. I flipped the switch and the light bulb did not illuminate. I removed the fixture again and brought the bulb inside again to test it in a different light bulb socket. The bulb worked inside the garage light fixture (again). The pool light breaker in the panel never tripped. If it had tripped I believe this would mean that I need a new light housing. Is there a way to fix my existing light housing or do I need to buy a new one that comes with the electrical cable from the manufacturer. It is about $160 for a new one and it will require that I rerun the wire to the switch but I am not an electrician so not sure whether to try this despite the Utube video's online which makes it look easy. Help ?