The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Phil Allison"
References: <4LPj9.email@example.com> <firstname.lastname@example.org>
Subject: Re: Halogen bulb drive
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Thu, 26 Sep 2002 10:26:42 +1000
NNTP-Posting-Date: Thu, 26 Sep 2002 10:15:37 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"N. Thornton" wrote in message
> nospam wrote in message
> > I did quite a lot of research on small halogen lamps some time ago. I
> > The most significant factor in life (ignoring mechanical vibration and
> > shock) is applied voltage. Life being inversely proportional to 12th
> > of the ratio of specified and applied voltage.
> Are you sure it's the 12th power? Thats remarkably high. Was your info
> source supported by other sources?
** That figure is definitely quite correct. It applies only for small
variations (say +/- 15% )around nominal voltage and is derived
One derivation I know of came up with the answer being the 13th
power of the applied voltage ratio.
A Google search should turn it up - I have seen it mentioned on
several sites about lamp life.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup