I just purchased some cheap UltraFire flashlights for use in Search and Rescue. These are really bright (description on Amazon says 2000 lumens although I don't believe it). I purchased these because we are a volunteer service and have limited funding and they are cheap. I'm wondering, if money were not a factor, what would be the best smaller in size, light weight LED flashlight that throws a good amount of light and will not drain the batteries after 30 minutes of continuous use? When I say small, I mean something not much longer that 6" or 7" and doesn't weigh a lot. Weight really is a factor when we have our packs full and are travelling long distances over steep terrain. Thanks.