H4...

[Huw Powell]

> I had a brief look at the headlights of a new US-spec Mercedes G the other
> day; 7" diameter, H4 bulb, and apart from the fluted or frosted top-3/4"
> strip, bunch of writing at the bottom, the lens was completely clear.
>
> If this is legal, I wonder what else might be (I guess regular old H4
> lights just lack
> the DOT seal?) - and is it possible to buy generic-sized lights that work
> this way?

Well... the "replaceable bulb" generic sized lenses that are easy to get
come in four sizes.  The DOT approval issue is irnoic - it's just a
matter of having the "aimer mounting" nubs on the lens front.

I have 7" round H4's on my F250, and those are, I think, DOT-approved.
Kick butt lights, too.

I have the 5-1/4" ones on my coupe, H4 and H1 both, neither are DOT
nubbed.

There are also the two sizes of rectangular bulbs.

These are essentially the four standards that used be used in the old
sealed beam days.

Those MB lenses are clear because they've used the shape of the
reflector to set up the beam instead of a "fresnel" lens in the glass
itself, probably.

hope that helps a tiny bit.

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/