Used in textile, printing and dyeing, clothing, automotive interior parts, geotextiles, leather, wood-based panels, wood floors, plastics and other colored materials light fastness, weather resistance and light aging test. By controlling the items such as light irradiance, temperature, humidity and rain in the test chamber, the simulated natural conditions required by the experiment are provided to test the light fastness, weather fastness and photoaging properties of the sample. With light intensity online control; Automatic monitoring and compensation of light energy; Closed-loop control of temperature and humidity; Blackboard temperature loop control and other multi-point adjustment functions. Meets American, European and national standards.