i was thinking snake enclosure...for a water dragon it will be a little different....i would enclose the sides and back or put plants or something in those areas....if they can see through it they might not realize there is a barrier there and run into it causing snout damage...that happened to mine while he was still at the pet store......if you screen in the top the mesh CANNOT be a tight mesh...that would block out alot of UVB from the bulb...as would glass or plastic....we used rabbit wire on the top of ours...now for humidity i put moistened sphagnum moss in my enclosure...and in the next few days i am gonna put a few live plants in...Pothos and Dracaena (Dragon Plant)...hopefully that will help too