After cleaning and draining and refilling the pool, the leak still exists. I patched all around the light with 2 part marine grade epoxy. That didn't seem to help. I'm back to assuming the leak is somewhere else, as I lost another 4" overnight with the pump off. Bucket test lost 1/4". There's definitely a leak.
Anyone have a good how-to on doing leak detection yourself? if not, can anyone recommend a good service in the tampa/clearwater area? The few I called estimated $1000 plus. :\