I have the C7T. I love it. It is super easy to use, and is reliable. One of the cheapest infinite brightness lights out there. Nice and bright. The lanyard that comes with it is kind of awful though. It is also a little too large to EDC. It is the same as the Maratac 9290, so if you like grey green better, that is the way to go. I thought I might eventually get the C8 2xAA tube for it, but I can't find it anywhere. Doesn't really matter, the C7 gets good battery life because I use it in low most of the time. It's nice knowing I could go to ridiculously bright when I need to.