My husband and I rescued a young female iguana 3 years ago. She was starting to get a bit too big for her cage so we decided to give her one of our spare rooms instead. She has four cat trees and each one has a hot spot at the top. Her room stays in the 90s with 65% humidity. I'd like for the humidity to be higher but she already has three whole house humidifiers so I'm not sure what more we can do about that. Her hot spots have 160 watt mercury vapor bulbs, changed every five months, approximately 12 inches away from her perch. I am concerned though because she doesn't always sit in those spots and I worry about her getting enough uvb. I'd appreciate any advice!