You dont have to use the recommended reptile ones, however you will need to turn the light off at night. BP's are pretty good with a 12 hour on and 12 hour off light cycle, but you can put a regular bulb in there during the day to keep the temps up until you can get your heating problem fixed.

Question: What are your temps like in the room where you keep your snake? Sometimes the key to getting temps in the cage up is getting the temps in the room up a bit. Some food for thought