She's in a 40 gallon glass with a screen top that's half covered by glass to help hold humidity. The humidity is usually somewhere around 65-75% on the cool side of her tank. I do know that the heat emitters/bulbs can dry out quickly, but I don't really know any other ways to keep the heat up. It's already only about 76 ambient with a hot spot of 85ish so I'm looking to take it up. How do you get the temps you need with just UTH/How many do you use? Thanks