I have the dynamo version of the Planet Bike Blaze. It's just as nice as their battery powered versions, but shares the same flaw of a narrow focused beam. A good be seen light, more so on the flash mode, but not a terribly useful seeing light. I'd really recommend one of the newer Bush & Muller lights if you go the generator route. The lyt by B&M might be a good choice, but I've never seen decent photos or a video illustrating its beam pattern and intensity.