Sure but why do AAA when there is AA and it's not that much bigger?
Hold your Quark AA in one hand. Hold a Maratac or ITP AAA in the other and you'll realize that there's a huge size difference. Makes all the difference in the world when considering putting alight on your key chain or in your cell phone holster (or, as my wife pointed out, in the pencil slot of a purse).
The only AA light that is of comparable size to a AAA light is the Zebralight H501. The new ones have a low low mode that might have similar run times to what we're seeing here from the Quark. Anyone willing to run that test?