Guys, the back and forth really needs to stop. Since this isn't a help thread I've left it up to you until now, but the topic and members of the discussion are up to OP as far as I'm concerned. I don't want to have to lock this down but will if the bickering continues since it's helping no one. Kingofnobbys, you've been asked to leave this discussion, but you are certainly free to begin a new thread and control a new discussion in whichever direction you please as long as it follows general forum guidelines.
I actually really like this pictograph even though it is a bit higher a UVI than I might suggest. But, I like it because they make it clear that you should be providing 0 UVI at a certain spot in the enclosure. That is something that I feel gets lost in the race to reach certain UVI levels at the basking surface.
I feel 4-6 UVI at the basking surface isn't unreasonable as long as their is a gradient down to 0. Unfortunately, that isn't always the case with some advice given. And when we focus on just one aspect of their lighting, such as the level at the basking surface, we turn a blind eye to a potential issue throughout the rest of the tank.