Weird things, they (when on auto) come on like a set of curtains opening in front of you and generally seem to work quite well swithing off and on any beam that may interfere with other traffic, seem to auto turn off when street lighting is present, good saftey function on 70mph dual carraigeway etc evenb lighting up either side of a car in front of you but not the car itself, very weird at first..............but a few times when on a dual carriagway they have pi**ed off HGV drivers whose headlamps are lower and behind the central reservation armco