I'm assuming not exactly on your TV? Perhaps on an entertainment stand with shelves? Don't see how you can balance an enclosure on a tv, especially with under tank heating. It can also produce annoying vibrations. It is best to place the enclosure in a quiet room where noise and unnatural lighting hours(us humans use to see) can be prevented.I have my gecko on top of my entertainment center above my tv. this may sound like a weird question. but dies the noise of my tv bother him. I have it on a decent volume it's not blaring.