Everything has to happen, the process of development and demise of the RGB LED downlight is no exception, there is a certain life. Early only flashlight LED table lamp such gifts, time spent not long life issues. The LED has widely used in outdoor and indoor lighting, especially high-power LED lights, its power, high fever, long working hours, and life issues are very prominent. The past that the RGB LED downlight life must be the myth of 100,000 hours seems completely shattered. So in the end where the problem is it?
Most of the white LED has been irradiated by the blue LED yellow phosphor. There are two main reasons caused by the LED light failure, a blue LED’s light fades, the blue LED light failure than red, yellow, green LED. There is also a phosphor light failure, phosphor decay at high temperatures is very serious. Various brands of led high bay light failure is different. Usually LED manufacturers are given a standard set of light decay curve.
RGB LED downlight light decline and its junction temperature, the so-called junction temperature is the temperature of the semiconductor PN junction, the junction temperature the higher the sooner the light fades, that is, the shorter the life. Can be seen from the chart, if the junction temperature of 105 degrees, the brightness dropped to 70% of the life of more than 10,000 hours, 95 degrees there is 20,000 hours, while the junction temperature cools to 75 degrees, there are 50,000 hours life 65 degrees can be extended to 90,000 hours. Extend the life of the key is to reduce the junction temperature. However, these data are only suitable for the Cree LED. Not suitable for other LED.