It is a huge area. I'm kind of regretting moving out of the 20gal tank, but I wanted to add the cool hid at the other end. I have some of the green terrarium rolled on most of the bottom of the tank. It is a large uth. On top of the pad I have the thermostat, the green terrarium stuff and some aspen. The screened top is covered with foil. At the other end I have coco fiber which I keep moist, there's a large water dish and then the piece of wood. I had the lamp on most of the day but just went in to change the water out and moisten the coco fiber in the cool hid. The humidity is about 50 but runs low when I have the light on. I usually put the light over the middle of the cage.![]()