my front lights are hella 90mm H1 lamps. they dont make that model anymore with H1 bulbs and the new lenses are available with H9 bulbs which are a lot brighter.
as most of you know, the brightness is heavily influenced by the voltage at the bulb. with the engine on at fast idle AND the low beams on, i measured 14.1v at the alternator. with the lowbeams still on and engine still running, i measured 12.1volts at the actual bulb itself. that drop is enough to take the light intensity down to 67% according to charts i look at.
i would have thought that newell used relays for the lighting circuit by the time my coach was built, but evidently not.
so, with my lenses so pitted, i am probably going to replace them with new exact replacment Hella's. they are avail at rallylights.com for about $60 each. i will also wire up relays and run new wiring to the headlights. the H9 bulbs in the new replacement enclosures are alot brighter alone and with better voltage at the lights it should be a ton brighter.
have a look here. pretty interesting and mike is very nice to talk to on the phone.
http://www.headlightservices.com/Wiring.html
another project....
tom