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Incandescent light bulbs are officially banned in the U.S.
(www.digitaljournal.com)
This is a most excellent place for technology news and articles.
It's more likely that the cheap ones are just using a driver board so cheap that it cannot tolerate the heat at all to cut costs, and the bulb dying sooner is just a nice side effect of that.
It's best to just not buy the cheapest bulbs. I've had good luck with Philips.