This product can provide three monochromatic uniform light sources: white light composite uniform light source and red, green and blue uniform light source to simulate weak light environments such as starlight and moonlight. It is used to test the performance of devices in different weak light environments, light transmittance and reflectivity, so as to realize the function of uniform light source. It can be used for the calibration of CCD detector and other photoelectric devices, the performance parameter test in weak light environment, and the transmittance and reflectivity of other samples; Experiments and applications requiring uniform light sources. Bus design, the whole machine is packaged and shipped without installation. It is equipped with a fixed protective socket. Users only need to connect a power cable and a USB cable to work. Fully embody the enterprise service concept with customer application as the core.