We went to a pool store yesterday and were looking at some pool lights. We were really interested in the Intellibright LEDs that change colors/patterns. But the sales guy said that he wasn't sure if they would work with a steel walled pool b/c: Apparently in gunite pools they make a special cove in the gunite for the light so that the water can sit behind the light and keep it cool(there is no waterproof seal on the light). Huh....so how do I overcome this with my vinyl DIY pool? Do I have to build something for the light to sit in so that water can get behind it without leaking behind the pool?