I have a glass viv with screen top. 3/4 of the screen I have covered with tin foil (layered) with the other 1/4 I have a ceramic heat bulb above it. very nice because BP's don't need or really want light so the Ceramic bulb is great for giving her the heat she needs with no light at night. She gets daylight cycles by the natural lighting of my windows and I just shut the blinds at night. The Ceramic bulb keeps my ambient at 78deg cool side and 88deg hot side with my UTH on the hot side adjusted to 90deg. Hit it with a spray bottle every few days.... humidity sits at 60% on cool side and 45% hot side. I bump it up during shed obviously.