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Light bulb question -- Daniel Stern?



 
 
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Old October 31st 04, 06:56 PM
Jim
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"Daniel J. Stern" > wrote in message in.umich.edu>...
> Whoops, see below. Shows what happens when I try to post in "food coma"
> mode after having just eaten a large dinner.
>
> On Sat, 30 Oct 2004, Daniel J. Stern wrote:
>
> > On Sat, 30 Oct 2004, Minnie Bannister wrote:
> >
> > > Went to the Sylvania Web site to see whether XtraVision bulbs are
> > > available for my 300M (they aren't) and looked at the comparison chart
> > > for Standard, XtraVision, Cool Blue, and SilverStar. I was surprised to
> > > see that for a given bulb type (e.g., 9004, 9005, 9006) they quote the
> > > same light output in lumens no matter whether it's a Standard or an
> > > XtraVision! So how come they claim that XtraVision are "brighter"?

> >
> > Sylvania primarily lists *NOMINAL* output, not actual, in their materials.
> > Nominal output is the legal spec contained in Federal code 49CFR564. The
> > spec for each bulb contains a nominal flux as well as the allowable
> > tolerance range as either a plus-minus percentage or an absolute maximum.
> > Take a look for yourself he
> > http://fmvss108.tripod.com/light_source_list.htm and you'll see how
> > coincidentally all those Sylvania bulbs just happen to (be claimed to
> > produce) exactly the nominal value, right on the nose. Quoting nominal
> > values is the same as saying "These bulbs are all legal". Sure they are,
> > but nominal values do not describe the differences in performance amongst
> > the different bulbs.

>
> All the above is fine.
>
> Corrections below in all-caps
>
> > Can you think of a reason why Silverstar (which produces near the LOW
> > end of the legal output) and XTRAVISION (which produces near the HIGH
> > end) would be quoted at nominal rather than actual? I can. I can also
> > think of a reason why Sylvania would field a gimmicky, expensive,
> > short-lived, low-performing Silverstar for your 300M but *not* a
> > higher-performing, non-gimmicky, longer-lived, less-expensive
> > Xtravision.


Another victim of inadquate headlights here.. 97 Sebring convertible.
So I replace the headlight bulbs with Xtravisions and make sure
they're aimed correctly. I'd like to find a set of aftermarket fog
lights for the car.. only mounting location is the factory holes in
the bumper. Looking to improve lighting right in front of the car,
ditches and road markings. Would also consider a dual filament light
to improve distance lighting with high beams.

Just trying to see better at night..

I have used high wattage bulbs in other vehicles.. I am led to
believe that it's not a good idea with these headlights.. why?

Thanks,

Jim
 




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