General LED lighting for the long life?

Many people are currently on the market big blow LED lighting, LED light emitting diode life span how long. I here to ask a question: How long is 10,000 hours? LED life is how come?
LED light source life has now reached 100,000 hours or more, with the continuous development of LED technology and application of technology a lot of popularity in the drive and cooling basically achieve a more satisfactory state of commercially available high-quality basic life LED tube to achieve 10000-50000 hours, almost 10-50 times the normal halogen spotlights.
10,000 hours which is long?
10,000 hours divided by 24 hours a day and then divided by 365 is equal to 1.141 years, that led spotlights life of only a year? I like how is unacceptable. Fluorescent lamps can be used for several years, not to mention the solid light-emitting diode led.
How life is counted?
First, we have to understand that for manufacturers to fully test a led light output is not possible. LED manufacturers are now using is to measure the light output of a certain time, such as the 5000h, and then use the appropriate mathematical method to infer the initial light output dropped to a certain percentage of the time
We have to ask you another question: We usually can not be led spotlights open 24 hours, and led spotlights the so-called test method is how? And what led lamp brightness down to test points for good?
So here domain optical want to say is Chi led spotlights, long life, still a big problem. Or should choose the number of production standards, quality control is better.