Anyhoo , I have 3 bikes with German made head and tail lights and dynamo hubs. Busch & Muller designed the reflectors to have a cut off beam pattern.
by having the LED in the top facing downward towards the reflector, not at the bottom of a parabolic reflector like a Flashlight & so many other bike headlights..

I have a battery one too..

Flashing strobe lights are Verboten in Deutschland on bicycles, so they don't. they, the dynamo ones have a light sensor..
In mt B&M Eyc senso T the day running diode is a flat little square, 2 of them . the sensor turns the bright diode on as it gets darker out..


Fortunately I don't have to commute in a big city some do to make & spend the big bucks that are to be found there..







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