Originally Posted by
jyossarian
Maybe people have trouble judging distances in the dark.
I think that's it. Also, it's easier to judge distances of larger objects; it's easier to tell the distance of a car with both headlights working than a car with one headlight working. A single blinky light doesn't give you a good sense of where a bicycle is. I wish there was a way to get two lights, far apart and side by side, without making it look like a car...