Bizarrely shaped enclosure

[Snagrio]

O.K. I misunderstood. The ceiling is 9 inches wide. Even without removing the fluorescent fixture, can't you fit a socket and cage for a CHE/DHP to the right of the fixture? I realize it's speculative at this point, but it doesn't hurt to kick ideas around.

There's roughly 10 inches between the bulb and the side wall on either side, so I guess one could fit? Also realized that, if I ended up with something other than a snake that needs UVB, there's already a perfectly good fixture for it, just need the bulb switched out assuming there's UVB bulbs around 4 feet in length since that's the length of the bulb already in it. Though I don't know if UVB bulbs need to be caged off or not, don't know how hot they get and some searching around hasn't given me a definitive answer either.