Last night I drove through Shadyside about 11 p.m. (on a Tuesday). In a two mile stretch of Center Avenue I saw three cyclists. I was lucky to have seen them, since none were prepared for night riding.
This is a photo of the first....

dressed in black, one tiny reflector on his seatpost, and no front light. He was virtually invisible. You can barely make out his head and torso between tne car and the bus.
A few blocks later, there was a woman approaching Center from a cross street. She was easier to see, as the she had the roadway mostly to herself, but she had no headlight, and had a grocery bag hanging from each handlebar end. So, poor illumination AND poor maneuverability. Great combination.
The third guy was just an average joe. No headlight, moving quickly. At least this one was wearing a helmet.
C'mon folks. We've read too much on these pages about the injury and death of cyclists. Can't you find the $5 or $10 that will help make you visible at night?
Sorry. End of rant.