I use the reptisun t5 HO 10.0 uvb tube light and I'm just wondering if it's bad that I have it on top of this screen (that it reduces the uv emitted or something) and if I should move it inside. Thanks
On top of the screen it's about 12 inches away from her where she's laying right now in the pictureDepends on what distance the bulb is to the basking spot.
Sometimes its beneficial for the bulb to be on the mesh. Sometimes it's best for it to be inside.
~10-12inches to basking surface unobstructed
~6-8 inches to basking surface if mounted on screen.
Based on your picture, if that's the basking surface, it looks like the bulb would be too close if you mounted it inside.
-Brandon