I use my
Mini MK-III during trips requiring air travel. The light is well known, and there is no need to elaborate on its utility. The headlamp adapter setup however deserves a discussion. I find it to be enormously useful, both in the air (when the overhead reading light is inadequate), and during the opportunistic hikes I frequently take at my various destinations (I'm a backpacker, so having a headlamp option is a no-brainer for me; I pack a few extra batteries so I'm always good to go when opportunities to hike a foreign trail materialize).
If you're on the fence about this light, put your doubts aside. It adds about 1.5 ounces (with battery) to your kit...you won't even notice the weight. The emitter's color temp is well balanced, and the candela numbers (even on the low settings) ensure excellent edge definition and color rendering under virtually all circumstances. The multiple programming options are a bonus, and are easily selectable (just remember to use the thumb-press method for rapidly cycling the light through the required on/off cycles).
[EDUCATIONAL NOTE: if you don't know about the thumb-press rapid switching technique, I recommend you search this forum for the tutorial on programming
FourSevens lights.]