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From: bill@thd.tv.tek.com (William K. McFadden)
Newsgroups: sci.electronics
Subject: Re: Turning Lights On
Message-ID: <9185@sail.LABS.TEK.COM>
Date: 22 Mar 91 18:51:44 GMT
References: <14740@mcdphx.phx.mcd.mot.com>
Sender: root@sail.LABS.TEK.COM
Distribution: usa
Organization: Tektronix TV Products
Lines: 15

In article <14740@mcdphx.phx.mcd.mot.com> hbg6@citek.mcdphx.mot.com writes:
->I gather the general opinion of the net is that bulb life is diminished
->by repetative thermal shock. Presuming that's true, wouldn't you increase
->bulb life by installing a high value resistor across the switch which
->controls the bulb? This would turn 'OFF' into a sort of 'STANDBY - KEEP WARM'
->mode.

Another way to reduce thermal shock, which was discussed a while ago,
is to ramp up the voltage gradually when turning on the bulb.  This has
the advantage of not wasting energy when the power is off.  Some
dimmers already do this.
-- 
Bill McFadden    Tektronix, Inc.  P.O. Box 500  MS 58-639  Beaverton, OR  97077
bill@videovax.tv.tek.com,     {hplabs,uw-beaver,decvax}!tektronix!videovax!bill
Phone: (503) 627-6920                 "SCUD: Shoots Crooked, Usually Destroyed"