I think that overhead heat with radiant heat panels is superior to any heating method.  With a heat panel, you get even, penetrating, heat and the ability to make temperature gradients by adding stacks of wood, branches, cork or rock under the panel. 

 I like flexwatt better. I'm only using it in my yearling rosy boa's plastic tub because it's the only option.

0.1 Mexican Black Kingsnake
0.1 Western Hognose
0.1 Childrens Python
0.1 Everglades Ratsnake  

0.1 Woma Python

0.1 Rosy Boa

2.2 Crested Geckos                                   

  "Extraordinary claims require extraordinary evidence" - Carl Sagan

Ridicule is the only weapon which can be used against unintelligible propositions.
-Thomas Jefferson

Science flies you to the moon. Religion flies you into buildings.