I think some of you guys are taking it too seriously. Sounds like it's intended as a fun, grass roots event with a throwback, renegade vibe and a built-in method of leveling the playing field (i.e., darkness). The sort of event where the ultimate result is not as important as everyone having a good time, and where a little DIY ingenuity can shine. Kinda sorta like a chainless race.
If that is the case, the participants should willingly accept the challenge of figuring out a lighting system that works. Otherwise, it won't really be much different than any other race, and you should just run it during the day (or not at all).
If that is the case, the participants should willingly accept the challenge of figuring out a lighting system that works. Otherwise, it won't really be much different than any other race, and you should just run it during the day (or not at all).