Any vehicle on the road that has a light colour over 6000 Kelvin should enable other road users the ability to shoot the driver, repeatedly.
It really pisses me off when idiots put 8000+ Kelvin (Blue HID) lights on their car cos it looks cool. If a Full Moon produces 4200 Kelvin, a bright day and the sun is 5800 Kelvin, and an Electronic FLASH produces 6000 Kelvin, what they hell do you think other road users see from your headlights?
Nothing, the Human eye will REJECT light over 6000 Kelvin, that's why most people BLINK when a flash goes off and you want to drive around in Blue HID Lamps cos they look cool????
/palm
Edit:
And Towcar, you just proved a point.
You are not always driving in a straight line on a flat grade.
The height of your vehicle and the position you are in relative to the other driver makes the difference.
I just LOVE 4WDs that sit too close behind me and reflect their lights into my rear vision mirror, sure, their lights are setup correctly.
Or coming around a corner and copping a full lightful from a moron that thinks HIDs are fine cos they setup their's correctly ...
Or Morons that sit just to the side of you and reflect off your side mirror.