I would guess that the fixture is trapping heat from the bulb and
overheating it.

> -----Original Message-----
> From: Robert E. Griffith [mailto:bob@JUNGA.COM]
> Sent: Monday, July 16, 2001 11:15 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: Bulb Life -- Burned out bulb resurected
>
>
> I have been having a problem with the light fixture in my
> kitchen going
> through bulbs fast (bulbs lasting about a month). This
> fixture uses the more
> expensive, large diameter bulbs.  When the last one went out,
> I did not
> replace it right away.  Several days later, it came back to life!
>
> Since then, it has gone out several times (for 2-7 days) but
> has, so far,
> always come back to life.
>
> I have measured the voltage in the socket during one of the
> bulb's dead
> periods and verified that there is power in the socket (117v).
>
> I imagine that somewhere in the bulb is an intermittent
> short.  The room is
> air conditioned so temp does not vary that much (except when
> the bulb is
> on:)
>
> Another strange thing:  Three times now, when other bulbs
> have gone out in
> this fixture, the glass bulb separates from the metal socket
> while the light
> is on and drops to the table below!
>
> So I guess my question is "Should I be concerned that this fixture is
> haunted?".  Should I call Bill? (Maurry - not Gates)
>
> --BobG
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On
> Behalf Of Jinx
> Sent: Saturday, July 14, 2001 9:54 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: Bulb Life
>
> > Ha ha! They don't want to educate you, they want
> > to keep you as stupid as possible and buying as many
> > bulbs as possible. Evil empires are like that! ;o)
> > -Roman
>
> Appropriate then that this is posted under an [EE] Evil Empires
> tag. What truth is there really to planned obsolescence ? Any
> proven examples ? Light bulbs and tyres spring to mind as
> products widely believed to be "improvable"
>
> btw, as I travel around I pop into the odd electrical wholesaler
> and always leave a copy of my bulb life web page and some
> comments from the list (anonymous of course) about extending
> filament bulb life. Had a few "ooohs" from counter staff as they
> realised the implications
>
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