At 11:36 PM 3/22/2009, Bill Prats wrote...
>  The replacement lamp is 40 watts and the others are 50 watts,
>what a big difference.  I no longer do much night driving but if I do

As others have said, that will likely melt the plastic.

Check out the Wiki article - 
http://vanagonwiki.net/index.php/Lights�Exterior_(94) 
(written by your's truly :-) )

I use the type 93 bulbs for the taillights, which 
put out 5 times as much light as stock, but only draw 13 Watts.