Oh also, your tank sound about the same size as mine and I use a 150 watt red bulb in addition to a UTH. My tank is fiberglass all around with a front sliding glass panel. I found that to maintain humidity with the red bulb, I had to get a very large water dish and place it directly under the bulb. Works great, looks great. I just bought the large reptile water dish at Petco for around $22. Yeah, I could have done way better shopping elsewhere, but it does the job and it's extremely heavy so the snake can't tip it over, which is really important with a large dish.