I haven't bought anything yet, but I'm currently looking at buying an 18x18x18 Zoo Med terrarium. I'll likely be getting a fantasy pacman frog to be housed in it, but would like to have everything setup before I get him. Looking around the forum, it seems most people use the domed-bulbs on top of their terrariums, but I don't like the way it looks....Is there a reason people seem to prefer the domes over the hoods designed to fit the terrarium? I'm looking at the Zoo Med 18" hood. It can house 2 bulbs and has separate switches for each light. Assuming the hood isn't a bad choice, which bulbs would be appropriate to use for a green fantasy, and would it be possible to use just the bulbs for heating an 18x18x18? My house is usually cooled around 71-73 degrees.