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

[Tor Arntsen]

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.