Originally Posted by wphamilton

My VW has them and I can't turn them off if I wanted to - I think they're required in Europe. I don't lose any sleep over it either way, but I do turn on the headlights any time close to dusk. There is good reason to believe that the primary effectiveness of DRL is in lower-light conditions. Do some drivers rely on DRL instead of headlights in the high-risk almost-dark times, and have more crashes? That would be interesting to know, but it wouldn't be the fault of the lights.