Can you please list your setup? Tank, substrate, heating, etc.

You will definitely need a uth and thermostat. Those night temps are way too low and may be whats putting him off food. Also I would get a kitchen scale to weigh him so that you can know what size food item to provide. I do the 10-15% weight rule. I follow the prey item chart from this thread:

http://ball-pythons.net/forums/showt...ht=feeder+size

Also don't change the bulbs for a day night cycle. If the room lightens up during the day and darkens by night then that should be good enough. The snake i have in a glass tank (aquarium) has a heat bulb running 24/7 with a uth and he gets a day night cycle by the natural light in our living room. I am actually going to be moving him to a CHE but it seems this bulb wants to run forever lol.