I use a Niterider Lumina 700 on the bars and another on the helmet. Great for dark twisty trails where there are lots of peds without any lights or reflective clothing. They actually are just bright enough to overcome oncoming car headlights in one area toward the end of my commute, with lots of stones and small branches on the bike path. The light on the bars is aimed somewhat down for close in light, and the helmet is aimed higher for distance. I just turn my head to avoid blinding oncoming bike riders. Never had anyone complain about brightness.