Comment Re:Not just cost, but optics (Score 1) 685
. it's rare to see LEDs used for illumination, though it is making an entrance for some applications, like flashlights and even headlamps.
Headlamps, as in the type that you wear on your head when you go hiking/climbing/biking, are now pretty much 100% LED lit. And it's not only about the order of magnitude gain in battery life, lamps can now reach over 300 feet at 300 lumens (Petzl Ultra, Princeton Tech Apex).