I have an iground pool light which in the following photos you can see the light ( I believe is a standard pool light with cables inside) and the electric panel. On the gravel is small tiny box with cables I believe is for the inground pool light. In the electric box, the GFI switch for the pool light it is always in the middle, but not the others strangely. I have changed the bulb last year. It worked for a while (3 weeks or so) and then went off. Previously the light was working for years until it blew off and once I changed the lights (cleaned the light housing, put grease on the sealant, etc). It was never the same again. The lights go off all the time after 3-4 weeks. I believe the pool light housing is dry when I installed the new bulb from the intheswim. We barely swim at night but I thought would be nice. What is the problem?. I had changed even the GFI switch from the box. Another thing to note is there is also another switch on the box. When it rains heavy the GFI light switch (controls patio lights) also goes into the middle.. when the sun comes up after like 1-2 hrs the switch can be turn on again with no problems.