Incandescent lights [Re: It's time to restore the 11/45.]

Jon Elson elson at
Wed Feb 18 11:55:37 CST 2015

On 02/18/2015 02:02 AM, Tor Arntsen wrote:
> On 14 February 2015 at 16:41, John Foust <jfoust at> wrote:
>> They consume about 18 watts and have claimed life expectancies
>> in the 30,000 to 50,000 hour range.
> But, is this the kind of life expectancy where they include the hours
> when it's also powered off? Because that's what I have seen for some
> early LED lights - 20,000 hours total lifetime if you used it only 2.5
> hours a day.. the rest of the day was included in the life time claim.
> Real life expectancy was thus only a bit more than 2000 hours, less
> than three months, which turned out to be pretty accurate in practice.
My home-made LED retrofits have already passed this mark.  
The first one I did
has probably run over 3000 actual operating hours, the 
others must be over
2000.  No sign of loss of output.  But, then these were made 
so they run real


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