I have an iguana that i have had for about 2 years now and he is about 4-5 ft long including tail. his tail is curently only 8 inchs long because the previous owner grabbed him by it and broke it off really close to the body but anyways since he is such a big boy i have a wodden cage that was built for him and he lives outside on my patio. Well when it gets cold we have trouble keeping the heat in because of all the open chicken wire area's. We have come up with the idea of at night when the temperature drops to put a tank over the heat light and a comforter over that all around the cage to lock in the heat for him at night. I was just wondering if anyone has a better idea of keeping him warm because we have no room to put him inside. I live in florida so it doesnt get that cold but cold enough for a lizard like that. Anyone have a better set up idea?