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Subject: Re: Halogen bulb drive
Date: Thu, 26 Sep 2002 01:28:30 +0100
References: <4LPj9.firstname.lastname@example.org> <email@example.com>
X-Newsreader: Forte Agent 1.92/32.572
firstname.lastname@example.org (N. Thornton) wrote:
>nospam wrote in message news:...
>> I did quite a lot of research on small halogen lamps some time ago. I came
>> The most significant factor in life (ignoring mechanical vibration and
>> shock) is applied voltage. Life being inversely proportional to 12th power
>> 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?
Sounds scary doesn't it, but, 10% over voltage reducing life by a factor of
3 doesn't seem so unreasonable.
It came from some manufacturer datasheet or app note, Osram or someone like
that. Don't know if I saw it more than once but I don't remember seeing it
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