U2? Please tell me more about the U2. Who is making it? Are there any sites where I can find more information?
As far as either light is concerned, I really don't have any "needs" in the sense that I have any specific use in mind for these. The fact that they are super hi-tech, military looking bright white LED lights really appeals to me. I especially like how the Arc4+ can be programmed and actually has an operating system of sorts. How cool is that? On the other hand, the Surefire appeals to me on the basis that it's backed by a large, well known manufacturer, with a good warranty. I'm not as familiar with the Arc products, but that's just because of my inexperience. Thanks for the great information.
JK