This thread has been so helpful! It's pitch dark when I ride home, and three times during the ride the bike path takes me through completely unlit parks. The first time I rode it I was terrified. With the help of this thread I have gone circus... blinking lights on the wheels, another on my backpack, a strobe on my helmet, a flashing red back-light, and a new Cygo-Lite MiliOn 150 USB LED headlight. The ride is much more calm now.. I'm also glad that the ninja joggers can see my headlight coming up behind them and move to the side of the path.