The major differences of led high bay quality lie in different chips and drivers, and of course these two parts can also affect product lifetime. Except for the different quality levels, different encapsulation techniques from the manufacturers can also greatly affect product quality. The light decay of LED Lights encapsulated using A-class adhesive is 76% less than those using common adhesive in the same aging condition. Therefore, when choosing LED high bay, the encapsulation technique should be concerned even for chips from famous brands.