Auto Headlamps – Not a problem, Just curiosity

[blktoptrvl]

They work just great at night, always on when dark. Yet during the day, they seem to come on ‘when they feel like it.’

For example, I usually leave the house at 8:AM. At that time, it seems bright enough to me, however, the lights choose to be on and stay on all the way to work (30 min drive). At lunch break and until about 4:30PM they stay off.

Today was a very overcast day, darker than most mornings when I leave for work, yet they decided to be off for ALMOST the entire trip to work – except for five minutes or so when they were on then off.

So the question is, does anyone know what the algorithm for the lights is?