Spousal unit was late riding home so I went out on the Dahon to look for
her. I know her route by heart. I got about six mile into the route,
tried calling her again, and she was home, having taken a different route.

This was the first time I had ridden on very dark streets with my
high-end dynamo system (SP dynamo and Herrmans H-Black Pro Head-Light
https://www.amazon.com/dp/B072K6PN64). Very impressive. I was able to
do most of the ride without the auxiliary battery powered light. It's a
really odd beam pattern with a very sharp cutoff, but a nice wide beam
which many dynamo lights lack
https://media1.rosebikes.de/product/370/2/2/2270481_3.ezm3vdup4f.jpg
(right to left). I got this light when it first came out after seeing it
at Interbike a couple of years ago; they claim that it's the first
dynamo light with a projector lens. I had to order it from Europe as it
was not sold in the U.S. at the time
https://www.bike24.com/1.php?content=8;product=214107.