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From: Chris Carlen
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020826
X-Accept-Language: en-us, en
Subject: Re: What type of bulbs do signs use ?
Date: Thu, 24 Oct 2002 04:11:10 GMT
NNTP-Posting-Date: Wed, 23 Oct 2002 21:11:10 PDT
Don Klipstein wrote:
> Most of this shock business is myth, even though light bulbs often burn
> out during a cold start. Cold starts generally do not cause significant
> fatigue damage, even if they make an audible "ping" sound. What happens
> during a cold start is that a thin spot in the filament has a temperature
> overshoot. The uneven evaporation that causes these fatal thin spots is a
> process that accelerates worse than exponentially, so saving a bulb from a
> cold start does not make it last much longer. Most of those soft-starting
> "buttons" that attach to bulbs achieve life extension mainly by dimming
> lightbulbs slightly.
> Traffic signal bulbs survive being started every minute 24 hours a day
> and traffic lights don't have soft starting devices nor idling current for
> the filaments.
> I have more info in:
I had a friend once, who said that an engineer from the power company
told him that fluorescent light bulbs used more energy when you start
them than they ever use while burning, and therefore it only makes sense
to leave them on all the time.
I simply couldn't even begin to reason with him, because he was so
attached to this absurd belief. It is so patently wrong on so many
aspects, that it is truly a very funny thing, as well as the biggest
howler, that it was the guy from the power company who he chose to
believe about it.
This friend was the same fellow that was convinced that all natural
rotational phenomenon turn clockwise. Never did he think of looking at
them from the other direction. That wouldn't matter anyway, since the
only correct way to look at them is from the direction in which they
Sound a lot like religion?
It was no surprize (though greatly saddening) when he joined the
Jehova's Witnesses. They practically ruined his life and health, and
now thankfully he's left them. Hopefully he'll gain some real wisdom
before life's end is reached.
Christopher R. Carlen
Suse 7.3 Linux 2.4.10
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