Lights on a bike are more for being seen by traffic than to light the road ahead. Unless you weigh your bike down with multiple lights and heavy batteries, most bike lights are horribly ineffective at night for lighting the road enough to see and avoid obstacles. I have a Dinotte headlight and on one of my commutes last winter I arrived home only to find a 1/2" gash in the side of my front tire and the tube bulging out of the slit. I have no idea how it happened, obviously I caught some debris that I never saw.
I'm thinking of adding a small bright white blinky light this winter. I've noticed a few people riding with them and they always stand out to me when I'm driving.
I also use a Planet Bike rear blinky.