I have two lights in the pool, one at deep end, one at the steps and there is another light in the spa. Both the pool lights are on the same switch and the spa light has its own switch. All three lights are fed by the same GFCI. The light switch is a single unit which controls the pool and spa lights (one of those half switches with two separate switches built into one unit)
A few days ago the lights were on for like 5-10 minutes when the deep end light went off by itself while the one at the steps remained on. I turned off the light switch and turned it back on. This tripped the GFCI.
I checked the switch and found a cross current between pool and spa terminals, replaced the unit. At the junction boxes on the deck I found wire nuts to be pretty loose. Disconnected the steps light and the deep end light started working. As soon as I connect the steps light, GFCI trips.
How can the deep end light go off first if there was a short in the step light?
Now that I have found out there is an issue with the step light, should I just buy a new light or try replacing bulb and gasket? Any way to check which route to go before starting to buy things? If I were to replace the fixture, should I go for intellibright with replacement of all lights with intellibrights in mind?
Do intellibrights need any special wiring? Right now all lights are 120V and all wiring running to the pool is simple 120V.