I work a four on four off 6-6 rotating shift schedule. I am either riding to work at 4:30 AM or PM or home from work between 6:30 AM and PM. By far, the 4:30 PM commute is the worst traffic wise. For the morning commute everyone is still asleep, and my evening commute they are usually home by the time I am on the road.
Riding in the dark, I run a Magicshine 1600, a FibreFlare red torchlight on steady, and a blinky on my backpack and one on my seat pack. I have been told I am visible from the adjacent freeway when I am on the frontage road over a 1/2 mile away.