I'm leaning toward picking up 2 or 3 Animal Plastics T8s (4x2x1). I want to heat them with RHPs, probably 40W ones from RBI. Anyway, one of the options with the T8 is wired heat tape for $35. I'm considering getting it and adding a secondary heat source. Is it worth it, or am I going to be wasting money? I'm kind of thinking that they top 2 cages (they'll be stacked) will get some belly heat anyway from the RHP on the cage below.