Much has been written previously on this and at
that time I was a bystander -

- but to quickly summarize it seems that incandescent
bulbs used 240 V mains blow unsually often compared
to those on 120 V mains and several people have found
a cheap, quick means of extending the lives of these
bulbs - at the slight expense of lower lumen output
via the use of a simple series resistor ...

Jim


----- Original Message -----
From: "Thomas L. Staley Jr." <staley@QUANTUMONE.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, June 11, 2002 11:43 AM
Subject: Re: [EE]: Bulb life - Resistor, Diode was: Phase control dimming


> One thing to considered is bulb efficiency.  I do not have data here to
> support it but when I was looking into making a brighter light for a
> friends bike I found the following.  The more current I pushed though the
>
> light, the more efficient it was (light output vs current input) but
> would burn out much faster.  The less current, the efficiently dropped
> quickly but would last longer.  There were some web sites that supported
> this.
>
> If you just used a resister you would loss power in two places.  In the
> resister as heat and in the bulb as heat also (less energy into light and
>
> more into heat.)
>
>
> Of course I could be wrong about the whole thing.
>
> Tom
>
>

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