One of the nice developments is the general high quality of several brands of lights -Black Diamond, Petzl, and Fenix all market very fine lights, both head lamps and hand helds, which will serve adequately - not quite up to ZL standards, but also less costly.
Another head lamp I have been using lately, very impressive is something from Australia called the Knog Quokka, USP rechageable, seems to work quite well, and weighs lsss than 2 oz, with a max output of around 100 lumens. I find it is an excellent addition to my survival items. AFAIK, it is available in the US only from REI - 25 bucks.
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Geezer in Chief