That's the great advantage of the LED that the lifespan is greater than any other light bulb and it does not suffer from strobing or flickering. It's a semiconductor that should take any frequency. Heat seems to be the main factor that kills them.
I guess the quality of the LED is what matters. So if they are manufactured cheap then they will fail but I wouldn't blame it on the strobing. Being in an enclosure where heat can build up then the life of the LED will decrease.

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold