you can buy a tank that will house an adult and just clutter it up. They feel insecure if there isn't enough places to hide or its too open. IMO bulbs just deplete humidity. I would seriously look into a plastic enclosure, they maintain heat and humidity a lot better than a glass tank will. Some examples to look at would be Vision Cages and Animal Plastics T8, there are plenty of users on here than can vouch for the Animal Plastics cages, I myself use visions, but that is because I can get them locally and don't have to pay for shipping.
Note: to get an idea of how to properly set up a plastic enclosure there is a really nice write up on here that should answer all your questions (I believe it was done by "The Serpent Merchant". I can't find the link right now, but you should be able to search for it