I did just change his basking bulb a couple months ago. Its a bit hotter than it was before. I had to get a different brand bulb, the store didnt have the ones i normally buy. I just figured he'd bask less or move lower if it was too hot.

It is a 12%. its a single bulb fixture with reflectors on both sides.
His basking branch is 6" from the top. The next highest branch is 8.75" from the top.
I cant remember what % my last bulb was. My husband had bought it. This 1 was changed 5 months ago. So I'll swap it out.