I'm very interested in the 2xAAA penlight version (I hope it will come with a pocket clip), and maybe I'm dreaming, but what would make it perfect (IMHO) would be a latching tail switch. Imagine being able to dial the head to a particular level and have the light come on, and stay on, in that level (or close to it) each time you turn it on.
Or you could simply leave the tail switch latched and still have the on/off variable output controlled by twisting the head.
A lovely thought .
In any case, I love that Curt is pushing the envelope to the extreme with this one. Exciting stuff!