Originally Posted by
polyphrast
i agree, that dynohub version is nothing special. I find that concept of the e-bike and battery powered versions interesting, because they offer switchable "wide beam" function in combination with the high beam. That gives you quite a versatile light. At the moment SP is acquiring the StVZO approval for those lights (according to their email).
Both my B&M Luxos U and AXA Luxx 70 Plus (both are dyno powered lights) have extra LEDs that light up at slower speeds to give you more lighting close up and a bit wider. That is automatic based on speed. Not sure how the lights measure speed, maybe based on alternating current frequency or maybe on hub output? Some have complained on-line that the AXA close in LEDs going on and off suddenly are bothersome, but I got used to that right away. The Luxos U it is more gradual instead of a quick on and off.
I can't imagine anyone needing over 2000 lumens for their electric bike, but I have seen plenty of bikers that thought they were safer when their lighting was blinding everyone else, at least the electric bike version would have a switchable high beam.