ok another newbie question. got a 4ft wooden tank, was planning to heat it with a bulb with a dimmer stat. My pet shop tells me I need a UTH. the woman i'm getting my snake off says a bulb will be fine. a friend who has lota of snakes says a heat mat on the inside side of the tank would be good. Some of the advice on this forum says put a heat mat under the tank on the outside, but my tank doesn't have any legs so is in direct contact with the trable it is resting on. HELP me I'm rather confused.