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

[Jon Elson]

On 02/18/2015 02:02 AM, Tor Arntsen wrote:
> On 14 February 2015 at 16:41, John Foust <jfoust at threedee.com> 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
cool.

Jon