A very interesting article indeed. I have been reluctant to use chem-lights because they are single use. I have a problem with anything that is single-use and not bio-degradeable. Not that I don't consume my share of styrofoam coffee cups and I certainly have some chem-lights. I don't pack them as emergency tools since they offer little useful in the scenarios I expect to find myself in. In mmost 72 hour scenarios there will be a time of stabilization where light is necessary. (extraction from smokey building, setting up expedient shelter after dropping out of the sky unexpectedly etc.) After that short time of stabilization, if it is dark I will have a signal fire burning and if I don't I can simply lay down and sleep. For that short duration stabilization period the activities require more light than that provided by most chem-lights. The military extra-bright ones might do the trick ( and being mil-spec, they might be more durable) but the cost and single use factors don't sway me from the flashlight dependancy. I have an ASP saphire light on my key-chain a AA Mag light in my vest pocket, and a photon 2 in my PSK. Of the three the Mag light is the most water resistant and the brightest (when the batteries are full) All would be sufficient to handle the stabilization tasks and far brighter than the chem-lights.

JMHO