18 Feb
2015
18 Feb
'15
12:55 p.m.
On 02/18/2015 02:02 AM, Tor Arntsen wrote:
On 14 February 2015 at 16:41, John Foust <jfoust at
threedee.com> wrote:
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
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.