Ok with a 5% you will want to have branches about 6 inches away from the hood and light. And I just learned this myself, but make sure you have a branch that is linear to your uvb too. This was something I was missing in 2 of my 3 enclosures, so I'm actually fixing that myself tonight.
I noticed you have a screen enclosure, do you need ideas on how to attach your branches so they are secure in your enclosure without adding strain to your screen?