If 16th power, then 5.4x. Getting closer.
I guess, though, the life improvement is not a simple function. Just increase
the voltage to the point when the bulb "blows up" immediately. Even simple
thinks can be rather complicated when we get in to the details.
Hans - N2JFS
-----Original Message-----
From: Jim Lux <jimlux@earthlink.net>
To: towertalk <towertalk@contesting.com>
Sent: Wed, Jan 14, 2015 2:21 pm
Subject: Re: [TowerTalk] Fwd: Fwd: Now THIS is a tower climb!
On 1/14/15 11:05 AM, Hans Hammarquist via TowerTalk wrote:
> It's a well know fact that the life span of incandescent light bulbs
increases with lower operating voltage. If I remember it right the lifespan
increases by 7 times with a 10% decrease in voltage. I guess a 240V bulb
working
on 120V would outlast the life of the radio station. Light efficiency (power in
- light out) is not that good though.
>
>
3.5x life if 12th power (e.g. 0.9^12 = 0.28)
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