Ahh.. so it turns your headlights on in a dimly lit carpark or garage and remains on for 10 mins after you hit the summer noon day sun then keeps your headlights off while you're travelling through an artificially illuminated tunnel? So what's the big deal if the tunnel is brightly lit? Ever been trapped in a pitch black elevator? Or drive at 100km/h blindfolded? At 07:20 PM 2/17/00 -0500, you wrote: >Oh come on, it is quite simple. >Once the car's ignition is on, if the light sensor sees dark it turns >the car lights on immediately and stay on until you turn ignition off, >or if the sensor sees light for more than 10 minutes... by the way, I >believe that the law says your car MUST stay with headlights on all the >time from dusk to dawn, doesn't matter what.