I would try and pick up a red or blue bulb and a dimmerswitch to control it ( at a minimum ).
That shouldn't break the bank but will still hopefully let you keep the ambient temps up - have you insulated the back, sides and bottom of the tank yet?
That can really help too.
dr del
yea ill pick one up tomorow. but do you think i could use a 60w house bulb just for tonight?
and a random quesiton dr del...could i keep an adult corn snake in a 41qt tub?