As a light source with high luminous efficiency, energy saving, long service life and easy maintenance, LED has been applied in many night scene lighting projects. However, it is precisely because of the characteristics of small size, high brightness, and PN junction characteristics of LEDs that there are many new problems in the evaluation of LED quality.
For LEDs used for general lighting, parameters such as luminous flux, color, and color rendering characteristics are important. In addition, to judge the quality of LEDs, we also need to comprehensively evaluate the parameters of optical, electrical, and thermal radiation safety and life.