Am using Ex-Terra. I have a 250 watt bulb in a barbed cage because anything above a 250 watt because it will overheat and crack (like the domes). But I have mine on all day long and he sleeps in the cover of his shelter. But it's your choice of what you want to do. Ex-Terra is not my personal favorite, but is has the most avablity in South Western Michagan (Zoo Med).
Thanks
Ryloth