Sort of .... the filaments are designed better so they produce better light.
The trouble with the
Vanagon lights is not so much the 9004 bulb, as the reflector buckets. Poor
light distribution
pattern compared to almost all other lights, which is why volks switch to
E-code and H4.

Go to the link (Daniel Stern) and take a look at the "products" link and at
the bulbs they offer.
Although they don't show a 9004, you already have that and can look at it on
your van. Notice
the H4 bulb base and it becomes apparent they aren't interchangeable. Either
call or send them
an email for more information. You may be able to splice on a plug they
provide, to your existing
wiring but then you run into being able to mount it to the vanagon.

http://danielsternlighting.com/

bob

On Mon, Nov 9, 2009 at 7:34 PM, David Cohen <Mtbdavid2@aol.com> wrote:

> Hi,
>  Does the H4 55/60w bulb put out more light than the  stock 9004 bulb?
>
> Thanks,
> David
>