Just got back from my first ride in a few weeks. Sunset now is about 5:30 PM, it is completely dark by 6:30 PM at the latest. Left the house about 7 - in 2 hours, I observed 4 separate cyclists riding with absolutely no lights at all. None was wearing particularly bright clothing either. Our street lighting here is intermittent, because residents have to sign up for and then pay for the lights street by street . Less than half of our residential streets are lit, and it is spotty on primary roads as well. I can't begin to fathom why you would ride at night without lighting. I have two of these on my bike for front illumination: http://www.philipsbikelight.com Plus a red tail light and spoke lights. I prefer not to die due to not being seen. Riding in complete darkness without lights - what could possibly go wrong?