Generally speaking, there are light-emitting diode LED light failure, especially high-power LED lights in the initial stage there will be some attenuation of light intensity, light failure will be smaller the longer life of LED technology is now high-power LED light failure can be maintained at 3% -4% per 1000 hours, LED packaging factory in order to provide stability to be high-power LED light products, or application-side vendors in order to obtain a stable home LED materials, they usually do some aging test. Of course, there are a variety of LED aging test methods, such as routine aging, over-current shock destructive testing, etc..

LED manufacturers are usually conducted with the following routine aging:

1, multiple pieces LED tube series aging: the aging of the circuit and constant voltage constant current circuit aging
2, multiple pieces of aging power LED tube parallel
3, LED tube series and parallel multi-satellites aging: string and string constant pressure and constant current aging and aging
4, constant current aging single high-power tube

Aging more than four kinds of high-power mode, 1,3 ways occurs as long as there is a quality LED failure, such as LED short circuit or open circuit will affect the other LED operating current parameters. 2 ways better than the 1,3-species, any changes will not affect the characteristics of an LED to another LED aging parameter, but in fact by way of limiting resistance is not reliable, the resistance itself, its resistance drift and LED voltage characteristics change will seriously affect the LED parameters. Obviously, the first four kinds of single-tube constant current LED current work captures the aging characteristics, is the most scientific way of LED aging.

LED aging process in the test should be a very important process, high-power LED is an effective means of quality assurance, but in many high-power LED companies tend to be overlooked, not to correct and effective LED aging, after the LED itself to face including brightness, wavelength analysis of all parameters will be uncertain. Impact of aging over-current LED manufacturers is often used as a means of aging, usually adjustable frequency, current and duty cycle adjustable adjustable constant current source in aging, to look forward to a short time to judge the quality of LED and life expectancy.