I went to replace the light - it seems like the original light. Got it out pretty easily. I left the bonding wire in but once the fixture was out there is no metal niche. Only a concrete hole with no bonding lug. The fixture attaches to a thin metal ring with no bonding contact. How is it possible there is no metal niche, but there is a bonding wire that just hangs in the concrete niche, that was wire nutted through the light switch to the breaker ground? Which also seems wrong. How do I bond the fixture if there is no metal niche attached to the grid? Why wouldn't there be a metal niche? Is it possible the light never was in a metal niche since it was built in 1978? Short of digging up the entire pool, is there any way to fix this? I know 12v LV still need a bonding wire but if there is no way to get a bonded metal niche would this be a safe possible option? Any help is appreciated. Thanks!