Originally Posted by
physdl
My one suggestion with riding at night is to be careful with your speed, particularly on downhills and in poorly lit sections. Visibility is substantially reduced (even with substantial lights) and it's much hard to avoid debris and the like. I have a half-mile long descent on the way home where I can easily hit 25-30 mph. I always keep my speed around 15-20 when riding home in the dark because you never know what's coming up.
With some of the good LED lights, like the Edelux, this isn't a problem. You can see, and be seen, for a hundred yards or so. At 30 mph, I'm in the traffic lane on my downhills, and there's not much debris. I know the roads from riding them every day; it's not likely a longitudinal crack wide enough to snag my tire will have opened up overnight.