CrankyOne and Kickstart ... thanks very much.
I know a lot about bike lights ... because I ride at night a lot.
I admit, though, I haven't done much investigating of dynamo systems because the good ones are expensive, and back when I first started looking ... they all dimmed out depending on vehicle speed. I am glad someone has fixed that, but not surprised ... it seemed pretty obvious.
I will stick with my Light-and-Motions, for most uses. I have a couple bikes where the added weight and complexity of a dynamo hub wouldn't be a drawback. I will check out those links.
Thanks very much.