Industry Standard
Country has no standard. Industry standard is: 1000h LED light decay is 0. 3000h is %. 10000h is 3%. 50000h is not more than 30%. Generally manufacturers can reach above LED light are quite formal.
The United States energy star standards
There is no national standard, refer to the United States energy star LM – 80 standard. 6000 hours, the flux rate of 94.1% or higher.