This is very preliminary as I haven't even decided 100% what I'm keeping in them yet. I already have the Visions. I was all set to grab a couple of the RBI panels and a decent t-stat and wire these up until I remembered the various ridges and ribbing on the floor/ceiling of the Vision cages. I think the 80 watt model will fit if I mount it between the ribs cross wise next to the cutout for the heat lamps, but if I do that I'm looking at my heat source being on the right 1/3 of the enclosure; will any heat reach the left end of the cage? I realize I'll want a "cool" side of course, but if I end up with 1/3 of my cage sitting at room temp and going unused by my snake. Just hoping somebody has used this combo before and had a good experience, I haven't used RHPs before and I'm trying to get an idea before I drop ~$100 apiece on these. Also how much does the RHP heat the cage stacked above it? If I'm stacking these cages how much "belly heat" will the top cage be getting from the RHP in the cage underneath?