I will get the the pictures, hopefully tonight. My substrate layer is 6 inches thick, and I use good ol fashon dirt mixed with a little peat moss, a little play sand to help hold burrows and leaf litter in the hopes that after adding springtails it will become bio-active: http://www.varanustalk.com/forum/index.php?pageid=Dirt
The one reason I do not use a CHE and use a basking light instead http://www.anapsid.org/parietal.html
I personally believe there is validity to it. There are people that successfully keep lizards without a basking light, but I beleive that a basking bulb is necessary which is why I dont use a CHE.