I use a 10 gallon with a similar hood. It takes two 25watt slim bulbs, works great for heat ( i use infared) I have some with one bulb in it too still stays pretty warm. The tank heats up pretty well too and holds humidity. There was a 3 inch hole or so in the back where a filter would go but I hot glued a piece of window screen over it works fine. For a smaller specimen (striped devils) I used the screen to cover the hole and hot glued a bead on the back covering any crack. If you're not doing a background though dont worry too much about the top.