Jee, how can anyone ride with 1000+ lumens without being sorry for other people on the road? I've tried to look at my Magicshine from the distance during daytime and it's painful! Clearly, at night it makes people blind..
I do have a helmet light, simple Petzl Tikka, and it's enough to be seen. I also run a combination of focused dynamo light and a Magicshine, but usually i cover the latter with my palm when a car or anyone else appears in front... Something you can't do with a helmet light.