My main headlight is a 950 lumen nightrider, used after dark. All the bikes have low to medium strength flashers front and rear, and my helmet has medium flashers front and rear. At night I switch the helmet light to solid to help light up off to the sides of the main beam or where ever I look. After dark I make the rear bike light solid.

I read somewhere that it is more difficult to gauge the location of a moving flashing light, and my own experience bears that out.

My next headlight will be stronger, but dimmable for traffic. I'd really like one of the expensive shaped discharge lights from Europe which would work very well with my helmet lamp "fill" light.