Your numbers seem high. You were getting 4.5 UVI with a 6% bulb at 12''?
-Brandon
These are Arcadias numbers as tested by their independent tester, right off their site.
But I do get similar numbers when you hit the "sweet spot" under the bulb.
The pro t5 reflectors are very good... ++
along with the ballasts in them.
Ballasts also make a big difference in the fixtures.
Thank you!
Todd
lightyourreptiles.com