Well I was using a heat bulb and uv bulb..but now I wonder is the uv necessary ..I say this because for one,my ball python hides 21-22 hrs a day and only comes out at night for a few hours.. 2nd,people don't have any sort of lighting when they have there BPs in a rack system..these are some things it am now wondering...I'm thinking all I need is one heat bulb for day and one heat bulb for night..
I also have both mine in glass tanks..29 gallon high has a 100 watt bulb and the 20 gallon long has a 75 watt bulb...my heat is always between 86-88 and humidity in tank is always averaging 40 give or take..I also have UTHs on both tanks and they get at about 85-88 degrees..so I don't get why you are having humidity problems.. I also leave a damp rag along the top of the tank covering about 60% of the top and that's not including what the light domes cover!but there is still plenty of room for fresh air...honestly,I did a lot of messing around,buying multiple bulbs and diff watts and moving the water bowl,using damp rags,moving the domes in diff spots and wel I've finally found exact what I need,took 5 weeks,but my tank is exactly where I need it to be. I really can't complain. My snake seems happy,eating and shedding with no problems,is healthy and active.