My night time commute is about and hour and a half. I have a red blinkie at the back and a Cateye EL300 and a white blinkie at the front. The main benefit of these is that I dont have to worry about when the batteries will run out. Most of my commute is with decent street lights, but I am planning on buying a Panetbike light to mount on my forks so I can maintain a better speed when away from the street lights.