What a wonderful thread, so much info and so many creative ideas! My winter project is to build a lighting system for my Speedmachine. Two systems, actually -- running lights and a headlight. The running lights will be a permanent part of the bike and will comprise turn signals, a tail light and brake light. The headlight system will be removable so I can take it off when I don't need it.

I'm still making the preliminary design decisions right now and will post as I progress.