I would be happy if the nitwits on bikes would just have any kind of light. I nearly got run over a few days ago while walking the dog at zero dark 30. the bike was almost invisible in the dark. Not even a reflector.

I suspect very few bicyclists have even a remote clue how hard they are to see sometimes. They are zooming around in and out of traffic like motorcyclists tend to do on occassion and they appear in total unexpected places because many just plain refuse to obey the traffic laws.