That's very thougful. But telling what his job is, and where He's going might help with the suggestions you will get. Good luck to both of you.Thoughts? No more than $100 or so. CR-123 (18650) or AA preferred. Reliability goes without saying.
John
V2 seem to be better than kromaL1 or LX2 were really popular with the Armyguys when I was deployed...the easy low-high setting, makes it a great infantry light. If he is going to be using this "in the field" (i.e. patroling areas in the country), then he'll need somethnig with Night vision freindy settings, in which case I'd recommend the kroma Mil-Spec.
How bout Surefire's Saint high CRIThis is indeed the friendliest group on the internet. Thanks to your recommendations and the generosity of a forum member, Justin (my son) will be taking 2 flashlights. One is a Surefire 6P with a Malkoff mod that was generously loaned by a CPF member. The other is yet to be determined, but will be a smaller, multistage EDC type lamp that can be carried or possibly affixed as a headlamp. Hopefully, I can finish up my research and have him something in a few weeks!
John