DRLs (Daytime Running Lights) are not for those who forget to turn on their lights at night, they are not for night at all. They are strictly for visibility during the day. They increase the contrast between the oncoming vehicle and its surroundings. Studies in Scandanavia and Canada have indicated a significant reduction in daytime accidents, especially during left turns. All motorcycles in north america are equipped to run with their headlights on all the time for this reason.