Yeh, I agree it is cool. I ended up buying the Luxos B for my recent rebuild of my winter/errand bike mostly because I didn't want to wait the three months that backordering was calling for at the time. The light level is amazing, even at speeds as low a 4-5 mph (plenty up close) and at speeds over 10 mph the distance brightness is great. Since as speed increases the power output of the generator increases, all dyno lights, get brighter as the bike goes faster--but changing the relative brightness of different LEDS is one of those ideas that makes you wonder why it took so long to occur to someone.

That said, I have every intention of installing a Luxos U on the touring bike I am building--though mostly because I was the USB power port to allow me to power my GPS device without relying on batteries whenever the bike is moving.