This standard mainly specifies the calculation method of two metric parameters required to evaluate the color rendering of white light sources: Color Fidelity Index (R) and Color Gamut Index (Rpo). The scope of application covers indoor and outdoor lighting levels dominated by bright vision, as well as white light sources and lighting systems dominated by general lighting. The terminology and definitions section clearly defines key terms such as Color Rendering, Color Fidelity Index, Special Color Fidelity Index and Color Gamut Index, providing a clear conceptual framework for the implementation of the standard.