I'm running a Schmidt SON-20 laced to a 650c wheel with a Lumotec 3W front light. This thing illiminates as well if not better than my 10W night rider. Highly recommended, best part is no dead batteries. What little drag there is, you can't feel, I'm running the same 25mph+ on the flats that I do without it. Made a nice addition to the Bacchetta for fair weather winter commuting.