Jon_Slider: After reading your post I realized I may have a 10507 from an old Christmas project, and i did!. I will admit that inside, the clear lens made a pretty big difference. Outside, it was noticeable, but still very lacking unless it was in turbo. I took it home over the weekend and even in turbo, the tops of grain augers and bins were not adequately lit.
While this light would make a great EDC for up close, or indoors, I need that distance just as much and don't want to carry two lights. So It will still go back. While not a deciding factor, I also noticed that brightness in turbo was highly dependent on battery charge level. Fully charged at 4.2v was drastically brighter than at 3.8v.