I use a homebrew dual 3W Luxeon setup in the front, and a massive home made 120LED lightbar in the rear. My commute is 15-20 minutes in one direction, in all weather conditions. The rear light is bright enough to land a plane, but the fronts are a little lacking. I'm sure that cars can see me coming from a huge distance, but they don't illuminate the road as much as I'd like. I hope to replace the front lights with either brighter LEDs or a 13W HID by winter.