The national standard GB/T 44268.2-2024 Definition and measurement of illumination characteristics of a microscope Part 2: Color-related illumination characteristics in a bright-field microscope specifies the color-related parameters in the illumination characteristics of a bright-field microscope, including chroma and the associated Color temperature Measuring method. The standard details the measurement procedure, required equipment, Microscope settings, measurement Stability, and information provided to the user. For scientific research, teaching, medical and other fields, the British-field Microscope aims to standardize the microscope lighting characteristics, ensure imagery mass and Color accuracy, and promote the design and mass improvement of Optical Microscopy products. The standard will be implemented on March 1, 2025.