Originally Posted by THE TECH
They come on anytime the headlights are on and are activated when the steering wheel turns.
They are pretty cool. I got to see them really work for the first time this summer when I was up north on a twisty road on a dark night. Very useful but I thought it was the main headlights turning. I live and work in downtown Toronto and am miles away from a street which is not lit up like a football stadium so I don't usually see the effect.