How can we know the working life of electronic/electrical components ? very interesting answer find here

We know that every thing has a particular life time period today we are showing you some components and there time period as you can see in above picture.
LED base on L70 has fifty thousands (50,000) hours and this duration shows the working time of LED when it is glowing . Electrolytic capacitor  we all are familar with electrolytic capacitor so its working life is 10,000 hours or we can say we can run it 1 ear without any rest . PI device it has very very greater then one lac hours or (100,000), similarly other semiconductors have greater then 100,000 and ceramic capacitors which is not provided by the manufacturers