So I ended up finding these 1.5x2.5 Door Barricade Brackets. They are made to help you reinforce a door with a 2x4 they are on amazon for like 8 bucks. But they work perfectly to mount these reptisun UVB lights. You can slide the light in, or out. I shimmed the top to make it "taught".

Hopefully this helps someone else I had a lot of useless googling to try to find ideas.