I do a lot of early morning (3:45 to 4:45) riding. Some parts of my commute do not have street lights. For the front end of the bike, my first concern is to see the road, not necessarily be seen by others.

I've been running an old Nightsun Dual Beam for the last ten years or so. The Nightsun Team Issue Dual Bean is probably the closest current model. 10W low beam, 30 W both beams.

10W is plenty good to actually see road hazards in the dark. But then, I eat a lot of carrots too.