I've seen references to people doing this, but what are thoughts in this forum about it? More specifically, what if you use a nicer dyno-light, but one that still has a reflector that shapes the beam (a-symmetric beam) for trail riding (e.g., an Edeluxe)?
I mostly go it slow, so i wonder about real-world usability; however, dynohubs like the SON claim to be able to achieve good usable light at about 7-8mph, and even at 4mph produce the same amount of light as old halogen lamps. I'm also absolutely prepared to use a second battery powered LED headlight for the slowest uphill sections (a 2W PlanetBike LED, in my case).
Just seems nice to not have to worry about batteries failing. On the other hand, i don't want to hit any trees,... and there are a lot of those here.