Thanks Bill, here it is from the website, apparently is it .35amps. at 12V off the DC adapter.  Amazing that is uses 8 AA batteries, I guess that is what those giant economy packs of batteries are for.

http://www.homedepot.com/Lighting-Fans/h_d1/N-5yc1vZbvn5/R-100138557/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

--- On Sun, 3/27/11, Bill Witz <pbwitz@SBCGLOBAL.NET> wrote:

> From: Bill Witz <pbwitz@SBCGLOBAL.NET>
> Subject: Re: Westy Interior Lighting
> To: vanagon@GERRY.VANAGON.COM
> Date: Sunday, March 27, 2011, 1:58 PM
> Hi : Dave these lights are a 12"
> florescent,you can use batterys or hook
> them up with to 12V you can get plugs that will fit at
> Radio Shack for the
> 12V hookup. Brand is called Amerrlle Utility Lite.The stock
> # (I think) is
> 73040. I have not measured the draw from the aux battery
> yet so I am not
> sure how much the loss is, but we had no problem useing one
> at a time and
> playing a dvd over the stereo for four nights camping on
> the coast in
> Jan.I got a two extra just in case of failure. If you can
> not find them I
> could check here again.
> Bill Witz 84 Westy Tiico "Old Paint"
>