What factors have led tube lights life decisions ?
How to predict the led tube lights？From the junction temperature to speculate life seems to be very simple, just check the graph in Figure 1 , you can know the junction temperature corresponding to 95 degrees can be obtained when the life of the t8 LED life of 20,000 hours . However, this method is used for indoor LED lamps have a certain credibility , if applied to the outdoor t5 LED lighting , especially in high-power LED lights, where there are many uncertain factors. The biggest problem is the LED lights radiator cooling efficiency decreases with time . This is due to dust , bird feces accumulation and makes its thermal efficiency. Because there is also a very strong UV outdoors , but also make the LED life reduced. UV epoxy encapsulated mainly on the aging play a significant role , if the use of silicone, can be improved. UV phosphor aging , there are some bad effects, but not very serious .
However, this method is used to compare the two opposite effects of the heat sink is more effective . Obviously, the smaller the volt-ampere characteristic left of the radiator , the heat , the better. In addition, for predicting indoor led tube lights life is still a certain degree of accuracy