I saw this today and contacted the owner about the light setup, looks pretty
heavy duty.

http://www.thesamba.com/vw/classifieds/detail.php?id=288632

You can read the details of the light setup based on what he wrote below:

From: Cyrus Pond
Date: Sun, 12 Mar 2006 16:52:50 -0700
Subject: Re: TheSamba.com Ad - 1991 Vanagon GL

The lights I have are 4 Hella 500's and they are wired to a extra Defrost
switch in the dash( you have an extra space for one under you hazard switch)
they are hooked up with the high beam switch, on your steering column. So if
your driving at night and you have all the cars lights on  including the
high beam you can turn  all the hellas on and off with the  switch on the
steering column or just  the dash switch. And I welded up the light bar and
bolted it to the bumper.
 Regards Cyrus

On 12/03/06, Robert wrote:

> A visitor to TheSamba.com has replied to your ad at:
> http://www.thesamba.com/vw/classifieds/detail.php?id=288632
> and sent the following message:
>
> From: Robert ( robertmstewart@mac.com <mailto:robertmstewart@mac.com> )
> Ad  : 1991 Vanagon GL
>
> I looked at your ad, I own an 88 Wolfsburg and would love to add a light
> assembly like what you have on your van. Can you proivde me any information on
> the bracket you have, how it is mounted, wired, lights you used?  Is it wired
> so you have the outer lights as driving lights, and inner lights as fog
> lights?
>
> Any help would be appreciated.
> Vanagon.com <http://Vanagon.com>  list serv memeber
> Robert
> NY
>