Yes its solid PVC enclosure. 120 gal. Critter Condo to be exact. I think I figured it out. Im going to use eye hooks screwed into ceiling and very small linked chain to create loops for fixture to rest on. Im also going to go get a 75w Arcadia halogen today to boost heat at a lower distance for her to bask in instead of the 50w that I'm currently using. As I mentioned before she really doesn't use basking decor much anymore mainly just rests on floor. Think she is just getting old enough to the point she cant really climb up on things to get close enough to the bulbs. Or as you mentioned before the lack of uvb might be a factor. So hopefully lowering her uvb will perk her up a bit. I just want one more verification on distance from you. Im going to stay with the 12% arcadia uvb so should I go 12" to 15" inches from basking decor to bulb or go from floor to bulb.