Relaying your headlights vs. headlight life

[Bernard Littau]

I recall that under-voltage was claimed to be bad for the quartz halogen
types of lights as they needed the full operating temperature for the
redeposition to work correctly.  A quick look at wikipedia seems to support
this:
http://en.wikipedia.org/wiki/Halogen_lamp

Best,

Bernard Littau
Woodinville, WA
'88 5ktq

On 9/12/07, mike <mikemk40 at yahoo.com> wrote:
>
> It was a long time ago but I seem to remember that a
> 10% drop in voltage equals a doubling of lamp life
>
>
> --- William Magliocco <magliocc at rocketmail.com> wrote:
>
> > Just a thought...
> >
> > When you give your headlights a nice, potent source
> > of
> > DC power, they will draw more current, etc. than
> > through the Audi OE wiring.
> >
> > One of the minor drawbacks is reduced filament life.
> >
> >
> > I work with vacuum tubes in large UHF TV
> > transmitters.
> >  These run $30,000 to $60,000 each.  We are taught
> > to
> > run the filaments as low of a voltage as practical
> > to
> > get the desired operation on the tube.  Filament
> > voltages above what are necessary shorten tube life,
> > end of story.  There is a term for this called
> > "filament management".
> >
> > In an automotive application, of course, we want
> > nice
> > bright headlights...
> >
> > Bill M.
> > Atlanta
> >
> >
> >
> >
>
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