I'm a car free full time bike commuter. Also, I'm a randonneur. As someone that has riden through the entire night while on my randonneuring rides, I have become absolutely convinced that I'm safer at night that during the day. A well-lit cyclist simply sticks out like a sore thumb.

One caveat, however, is that during that period of time between fully light and fully dark, your bike lights don't compete well with other, much brighter light sources.

Light up and ride on,
Dave