I have a 10 for Odyn. On the hot side I have his uth which reads 90 on the glass. His hid then a 40w red heat bulb on top. I have an accurite temp gage that is I. The front middle of the tank for ambient temp and humidity. Ambient always stays at 81, humidity stays at 65-70. I use reptile prime coco husk. Aspen will suck the moisture up so change that. I have cut a piece of cardboard to fit the dimensions of the screen top, put the lamp on it(off of course) traced around it and cut out the hole for the heat lamp. I then covered the cardboard with foil. All my temps stay the same on average. I also have fake ivy in there for him too. My water bowl is in the middle, not under my heat lamp.