I'm a happy owner of a number of LED flashlights, among them Streamlight 4AA LED, CMG Reactor, MiniMag with Opalec NewBeam, and a whole bunch of those cheap Eveready 2-LED folding lanterns (the latter work great to leave running around the house during a nightime power outage).
Of these lights, my favorite for overall usability is the Streamlight, but I really REALLY wish its output were regulated! For a quick partial solution I've put lithium batteries in it, but that makes me nervous given the increased temperatures these produce with this light.
Does anyone know of any mods having been done to the Streamlight to regulate its output?