enclosure heating

[ChameleonMD]

I'm looking at building a nice enclosure for my boas and pythons, and just have a quick question regarding lighting and heating - its going to be basically an all-wood enclosure, minus some mesh on the side, and maybe some plexi up front on the door, but am kind of unsure how i should go about heating the sucker? UTH, bulbs, and if so, how should i mount these to prevent our little guys from burning themselves?