Go with the second option. I don't think the fixture would even fit width wise anyways. Not that you'd want that though. Positioning it all the way over on the hot side above the basking site, and parallel with the long wall provides the best uv gradient.
Go with the second option. I don't think the fixture would even fit width wise anyways. Not that you'd want that though. Positioning it all the way over on the hot side above the basking site, and parallel with the long wall provides the best uv gradient.