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. But 4W through a 60W bulb likely will last until building falls down.
Indeed, other than that the article describes it as the "Longest Burning Light Bulb"Forget LED lamps if you want long life from your lamp...
Yes, that is one of the most common, and very simple, statistic used as an index of lifespan for things, particularly consumer products - mathematically it is simply the median time to failure. The other fairly common approach is to use statistics such as MTBF {mean time between failures}, more for 'non-consumer' purposes).As I understand it bulb life is worked out by how long it takes for 50% to fail, it is accepted some will have a shorter life and some a longer life.
That's obviously true. There is nothing 'statistical' one can determine by just looking at 'a sample of 1' - which, as you imply, could just be a fluke, totally unrepresentative of how bulbs in general might behave.So one can't work out bulb life from a single bulb, so once 50% have failed that's it, even if one odd one in the batch lasts 10 times longer.
Nobody who thinks that "The new eco bulbs take all week to warm up" has any credibility in the matter of understanding the passage of time.For example, this one was still working in 2013
The reason, of course, is that there was a very high rate of infant and childhood mortality, which dramatically pulled down the 'average' over all people that were born.
Both true. However, whereas the start of "the first few days of life" is well defined, ascertaining when the start of "the last few days of life" is going to occur requires a crystal ball.The first few days of life are among the most dangerous. ... The last few are even worse.
Or a foolproof plan and some kind of weapon.ascertaining when the start of "the last few days of life" is going to occur requires a crystal ball.
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