Bring yourself into the 21st century and upgrade your lights to LED. Just plug into your dynamo and ride away: no worries about overvolting the lights. Since many of these are made in Germany, they adhere to the German requirements for what resembles a low beam on a car which puts the light where it's needed. They also tend to measure brightness in Lux, not Lumens. Personally, I tend to prefer a minimum of 60lux for commuting - YMMV.

Busch & Muller are perhaps the biggest name: https://www.bumm.de/en/
Peter White has a great website showing beam patterns: https://www.peterwhitecycles.com/