I found some info on e-code and "blue" lights that might be significant.
http://lighting.mbz.org/tech/info/blue_bulbs/

I'm interested in the $34 dollar lights you have KBatzler, how are they
working out and how much of an improvement are they?

KBatzler wrote:
>
> Last time that I check with the vendors on-line, they were about $34
> each...somewhat more than the GE's.  The major difference the the light
> pattern....BIG difference.  Also, you don't need to throw out the whole assy
> if it burns out, only the bulb, plus there are a wide variety of bulbs
> available (different wattages, and even colors.  Blue works especially
> well...almost looks like xenon lamps).  BTW: The H-4's I'm talking about are
> also used in many motorbikes 7" round just like the Vanagon.
> Karl Batzler
> -----Original Message-----
> From: Philip Hanson (Volt Computer) <a-phanso@microsoft.com>
> To: 'KBatzler' <KBatzler@EMAIL.MSN.COM>
> Date: Tuesday, November 10, 1998 11:04 AM
> Subject: RE: halogen round-eyed vanagon lights
>
> >Do you know what they run?  Are these items you mention the same?  Do you
> >know if they are better than GE's?  Thanks.  ph
> >
> >-----Original Message-----
> >From: KBatzler [mailto:KBatzler@EMAIL.MSN.COM]
> >Sent: Monday, November 09, 1998 8:38 PM
> >To: vanagon@VANAGON.COM
> >Subject: Re: halogen round-eyed vanagon lights
> >
> >
> >Try Hella or Bosch H-4 headlights....they work great for me....
> >Karl Batzler
> >-----Original Message-----
> >From: Philip Hanson (Volt Computer) <a-phanso@MICROSOFT.COM>
> >To: vanagon@VANAGON.COM <vanagon@VANAGON.COM>
> >Date: Monday, November 09, 1998 9:52 AM
> >Subject: halogen round-eyed vanagon lights
> >
> >
> >>Has anyone ever installed these?  What works?   ph '80
> >>

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