I plan to build a rack to house my ball pythons, Should I be using heat lights as well as the undertank heat? I think it would be a good idea because it will keep the ambient temps up and i would be able to do night/day cycles.. if i do do this, what kind of lights would i be able to use to work good in a rack.. if you have a rack with lights, how do you have it set up and with what type of lights? thanks