This is quite off topic, sorry.

If you want a dyno powered light that has a flashlight type of pattern (round beam), buy a Sinewave. Pasted from their website:
WHAT SHAPE IS THE BEAM?
The beam is round/symmetrical. This makes the Beacon an ideal choice for bikepacking, mountain biking, or any offroad riding. The Beacon can be used on-road as well.

From: https://www.sinewavecycles.com/pages...-headlight-faq

I have done some gravel riding in the dark, and for that my B&M light pattern was not ideal because my light was often going up and down, the vertically narrow B&M beam was not very convenient.

But I would never suggest the Sinewave light for on-road use. For that, I suggest a German light.