Abstract The Spectroradiometer Integrating Sphere system has emerged as a critical tool in the photometric, colorimetric, and electrical characterization of modern lighting products, including energy-saving lamps, fluorescent lamps, HID lamps (such as high-pressure sodium and mercury lamps), cold-cathode fluorescent lamps, and LED lamps. This paper focuses on the LISUN LPCE-2 (LMS-9000C) High Prec...