I used to ride in to work in total darkness. In addition to a small front light on my handlebars and a red flashing light on my trunk, my secret weapon was a us coast guard approved waterproof strobe light attached around my upper arm on the traffic side with a velcro strap.(the kind you would activate after abandoning ship, bobbing in the ocean in your life vest) That thing has an incredibly bright and frequent flash. It was great on my dark and lonely ride into work - cars would give me WIDE berth (I think they couldn't tell exactly what I was, but they could see me from a long ways away and they would give me plenty of room, never a close call) However in traffic, I think it would probably be a dangerous distraction. My commute takes me an hour where I live now. Somehow leaving the house at 515 am does not appeal....Tokie