How do you get a decent lighting system if you only have 3 watts to deal with? I run 5 watts just on my tail, and I certainly would not be willing to reduce that. Even with an efficient shaped beam I'd think you'd want at least 3 watts up front as well. My current light draws 8.5 watts, I imagine a shaped beam could get that down to 5 and still seem reasonable, but I'd think 10 watts would be a minimal amount of light I'd want to commute with in total.

I'm not trying to diss dynos. I'm getting involved with the discussion because I'm interested. Just not sure if I'm interested enough to drop $250+ and build a wheel in the middle of the winter, rather than just continue to use the $30 light that I'm reasonably happy with now.