For the dynamo folks (all three of us 😁) here is some video in case you were thinking about an IQ-XL Dynamo at all. This is a recent new model that has a high beam controlled by a handlebar button, derived from their e-bike version. High beam is basically a floodlight, while low beam is what you'd expect for a B&M StVZO-certified road headlight (except more powerful than anything they've made before now).
Short video clip, a bit overexposed but a quickie intro to the Low/High beam patterns: https://youtu.be/y-9GcasyzI4
Longer video clip at 4k, with the exposure dialed down to be more realistic: https://youtu.be/N3q83z3l3lQ It's 13 minutes, I won't blame anyone for not watching the whole thing. The first 3-5 minutes have a mix of low and high modes, partly in reaction to oncoming traffic.
by mechBgon