I didn't intend to cause any confusion here, I just wonder if anyone knew why the book would say what is does.

As far as my set up, it just depends on which reptile. My iguanas and BPs have a UTH to help keep the ambiant temp up at night. For all my reptiles I use CHE to provide the basking spot heat and over all temp. For lights I use different repti glo depending on each individual needs.

the set up I have for my Savannah is a 3x3x3 foot enclosure made of wood with a light bar and 2 CHE with about 19in of substrate. The enclosure is smaller because he's not quite a foot in size yet.