Tim:
I just got through installing a couple of Hella Dome Lights taken from VW's in my 91 Vanagon Westy.  One was from a mid nineties Jetta, and one from a 92 Eurovan.  The nice thing is that they have a ten second delay in turning off after the door is closed.
I've got a few pics on the website if you want an idea how they look.  Very happy with the outcome and I was able to get each for 10 bucks or less (used off of ebay or the junkyard).

For pics, hit the website below and go to Electrical > Electric Misc > Interior Lighting

Brent
http://www.weidefamily.net/vanagon/

Date:    Wed, 6 Jul 2005 17:50:24 -0700
From:    honemastert <honemastert@GMAIL.COM>
Subject: Westy interior light replacement (want one like my EV)

Looking to replace the power hungry stock=20
'incandescent' fixture in my syncro westy with
something like the ones in my 02 Eurovan MV
Weekender.

Anyone know a source for these other than=20
VW? =20

The ones in the EV put out a *lot* of light

TIA

-tim