What I'd like is something like the nice dynamo powered headlights (Busch & Meuller) mounted over the front brake with some type of adapter arm thing? Something that doesn't take up more space on the handlebar or get blocked by my handlebar bag & cables. Battery power preferred. I know Sheldon Brown had a photo of a bracket rig he made attached to the front axle which brought the light beam right down to the road level. Again something in the centerline of the frame over the front caliper seems best.