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This whole "life of the bulb" issue has always bothered me, because quite often, bulbs fail through the light fixture being knocked down, or for some other reason that seems to have nothing to do with the actual "life" of the bulb.
So one question I'd like to see covered is the relative sturdiness of each kind of bulb. If my son knocked over his bedside table in the middle of the night (it's not as stable as it should be), will an LED or CFL be more or less likely to survive the crash in good working order?
Also: the longer a bulb lasts, the greater the chance that it will experience one of those bulb-career-ending events. How many bulbs actually get to live out a normal lifespan? I'd like to see some research on that point.