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From: "Phil Allison"
Subject: Re: Halogen bulb drive
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Wed, 25 Sep 2002 09:23:00 +1000
NNTP-Posting-Date: Wed, 25 Sep 2002 09:11:59 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Ian Stirling" wrote in message
> I understood it to mean from the context I saw it from that it meant
** The vast majority of halogen bulbs are low voltage - 12 and 24
volt. These used in motor vehicles, projectors and di-chroic mini lights by
110/240 volt halogens are not so common - and since the OP made
no special mention of them or having a 110/240 DC supply available then it
seems a non issue.
> > you get current flowing through the
> >> gas, which causes redistribution of the fillament, and early failure.
> > ** Very thin filaments cause that one.
> DC voltage across the lamp also causes thinning at one end.
** Have you any published figures on this? Is it a factor at 12 or
. . . . . . .. . Phil
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