she needs a basking zone plus a cool zone. Uvb + incandescent light + enough added heat = healthy basking. Pls get melissa kaplans *iguanas for dummies*. Or look for her icsf article at anapsid.org. Two 36 inch 10.0s will work well. Bask temp is about 95 f. Cool zone is 75 f. Make the basking at a high shelf and the cool zone at bottom. Dont over-ventilate her cage as she needs at least 65.% humidity. Pls read al you can aboutiguana care.