One thing I forgot to mention. At Target, there's a Rock River Light that's claiming 30-40 lumens on the package. Runs on one AA, seems fairly robust for $20. As much as I use it, I wish I'd bought it instead of my Surefire. Carried well, it's in my go-bag right now, though it might get moved. I don't normally EDC a light except on a Photon on my keychain, but this is probably one I would, due to brightness and ease of battery replacement.