I have the fluorescents and they don't get hot enough to burn them. I left them on for a few days before I put the snakes in to see how the temperature inside would change, and they never got hot enough to cause a burn.
Fluorescent fixture wont burn your snake. I'm using http://www.homedepot.com/p/GE-18-in-...vZc7phZ1z10h7q in my red tail boa Pro-Line for 2 years now and nothing happens other than her pulling the plug cable down to the floor and crawling over it. I have it bolted to the roof of the cage.