The lamps are sucking the humidity right out of the air. Get a UTH for the hot spot, ball pythons like belly heat. It will help humidity a ton. Make sure you get a thermostat though. NEVER run a UTH without a thermostat because it can get so hot to burn your snake.
This is a great thermostat for the price. http://www.amazon.com/Hydrofarm-MTPR...4772034&sr=8-1
Ok, I'm going to pick up a UTH that puts out 8 watts today. The store doesn't sell thermostats, though, and it'll take Amazon a couple of days to get it to me.. What can I do til then?