It should be pretty much a drop in replacement to put in a Pentair Intellibrite 5g spa light (color led) http://www.pentairpool.com/pool-pro/...duct.php?id=74 as long as you have a pentair niche. I think you basically disconnect the old light from the wiring block, attach a fish line or cable to the wire, pull it out, the attach the fish line to the new light's cable. Pull it back and connect the new wires to the block. Someone else could probably walk you through it in more detail. There may be some more wiring involved since it sounds like your old pentair light wasn't already wired to that controller.

I replaced my pool light last year, but I hired someone to do the work for me.