A 55 is really big so it will need to cluttered up by lots of trees, hides, plants, and such. As for heating I wouldn't bother with a UTH. I would simply put a 50-60watt red bulb over the cool side and a 100watt red bulb over the hot side. Both lamps run 24 hrs. This with most of the mesh on top covered by towels or aluminum foil should keep your temps and humidity pretty good. Depending on the temps of your home those wattages may need to be increased or decreased some. Hope this helps.