xxcycle.com in France seems to have just about every B&M dynamo headlight available. If you spend some time browsing the site, you can see that each letter in the model name refers to a feature such as light sensing, manual or auto switching. It tells you how bright the light is in Lux which is different from lumens, making things hard to compare. A 50 Lux light is adequate for most of us and might be roughly equivalent to 200 or 300 lumens. The difference the measurement methods is that Lux is at the lighted object whereas lumens is the measure of output from the source of light.

I put this light on my wife's bike. It's called an Eyc, pronounced Ike. It's so tiny it looks like a toy but it works like a champ. It is currently listed at 33.33 € which is $37.75. They have cheaper ones going down to 15 Lux. 15 Lux might be good for in the city and just being seen.