On that CNET link there was juicy bits if info regarding the operation of these little gems including heats sinks and dos and don'ts regarding placement. Don't install them in enclosures otherwise they can't rid themselves of the heat they generate and die a slow death much faster than advertised. Nice info regarding light color and their respective heat ranges.
Do read through some of the first comments.
Well, its more pay attention to them if you install them in an enclosure. I have a bunch of the Phillips bulbs installed in the standard "globe" fixtures at the Teotwawki place - been there for years now. Not a single failure yet. Ultimate life is yet to be seen, but 3 years and counting on those - nor have I seen any noticeable lack of brightness. . Nor have I seen any failures here with the CREEs - and they can get warm-- never had them be "hot" - certainly not as hot as a 60 Watt gets.
Will they last 20 Years? Perhaps not. And at $25 its probably a bigger risk to take. Not so much at $12.
One of the articles pointed out these are rated in hours, not years, and if you run them 24/7 , 25,000 hours is about 2.8 years. Of course, if your electricity bill is $0.08 a Kilowatt/hr - your incandescent costs $120 to run over that period of time. Your 10 Watt LED will cost you $20. -- not to mention your incandescent would probably be replaced at least once over nearly 3 years. But say you have a really good incandescent that lasts forever. And you buy the LED at $12 SO say it runs half as long and you have to replace it halfway through-- two bulbs were $24. You still saved $76 over the period. ? If they last a third of the rated capacity at 8000 hours you have
And energy costs are only going up-- in some places they are already over $0.12 KW-HR. - .08 is actually on the low side. So yes, if you can find a brand you like for $10 - even if it only lasts 8000 Hrs and you replace it 3 times. , you still saved $28 bucks. Really it has to only last 1/4 of the time advertised for you to be at the break even point. The same is true of CCFLs as well ( but I hatez them) and those fail as often as Incandescent bulbs in my experience.
But who leaves a light on 24/7? Almost no one. So this means that you won't be looking at replacing that bulb again for probably 7 years..even in the worst case.
The prime mover is sometimes the energy you pay to use the thing, not the thing itself...