Hi Guys, I'm new here and need some expert opinions. Which AAA, AA or CR123 single cell light will provide the longest runtime? I usually only use my HDS twisty on the lowest setting (.3 lumens) and was wondering if there was another light out there that could give me substantially longer runtimes. My reasoning is that I thought I might be better off to save the twisty's battery for the odd time I need a bright light and then keep another low output light on me that is super efficient with it's battery. Thanks!