Büsch & Muller Lumotec IQ-X
Very bright (100 lux) dynamo headlight with a wide, even beam. Aluminum alloy housing. A built in sensor switches the beam between the night beam and daytime running mode depending on ambient light conditions.
The fork crown horizontal piece is fairly tall (32mm). If you have a steel bicycle with a cast fork crown you will likely need to use some spacers, or the bracket will hit your lower headset cup. You might also consider the Cyo mount if you're planning to mount this light on a steel fork.