> In my youth we had a formula for adjusting the headlights on a
> car ( I think
> it was actually part of the DMV drivers license test). It was something
> like the beam had to drop 2 inches at 25 feet and
> the left light had to be so many inches from the centerline.
> Anyone remember the formula? ( or remember your Dad telling you the
> formula :)
The formula my Dad taught me, and I've always used, is that the "hot spot"
of the high beam should be straight and level. Thus at 25 feet, it would be
the same height as the lamp, and straight ahead.
But also check out
http://lighting.mbz.org/tech/aim/aim.html
Randall
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