I have an 8500 IG fiberglass pool with Fiberstars fiber-optic lighting. The pool guy came by yesterday and saw that there is water in the lighting housing dome underwater. He says this is why my light isn't working. Could he be correct? I don't have much faith left in my pool guy, but pool guys that come out to the house are hard to find under $100/hr around here... and hard to get them to come out period. My electrician won't touch it.