I too use the same bulb. I keep my 6 Month old jackson cham in a large inclosure. Leelo seams to be doing fine , he eats a lot, drinks a lot, and is very active. It also is the 160Watt bulb. I beleave the inclosure size is 58"X48"X58". I use the 160 watt Bulb and use a floresent bulb, i forgot the name.