I came across this nifty advertisement for the Petzal headlamp.
I really, really like the idea, the ability to "program" battery/light power consumption.
Obviously this technology will cost, but in user friendliness, and real-world application it has to be where all personal lighting is going.
Be sure to at least watch the part 2 minutes into the schtick -heck watch the whole thing.
Are there other products out there that can do this?