Those are nice, but LED lights are nicer - in particular for survival settings. The efficiency of LEDs converting eletricity to light is just so much better. Much more light and much longer runtime. And no bulb to break - LEDs won't break unless you smash them with a hammer.

I'm a big fan of using gear that has a track record: You know it works, you know what it can do and what it can't do. Let someone else suffer the pain of "bleeding edge" technology, but do take advantage when new technology both is "track proven" and offers significant leaps in performance. Replacing that maglite with a fenix E01 ($12-15, single level 10 lumens for 10 hours, then 11 hours of fading "moom mode" light, single AAA battery, virtually indestructable) is one such leap.