My Zed had fly eye on the lights when I bought it, next day / night, out for a drive and fog decended rapidly, couldn't see a bloody thing and had to drive with my main beam on most of the way home, not one car flashed me to indicate I was dazzling them. Tore it all off next morning. My opinion... don't do it, at least not during winter months, fine for summer and long days, but not for winter driving.