The PL-KT300D wavelength adjustable monochromatic light source xenon lamp light source is an adjustable light source system composed of a 300W xenon lamp light source, a multi grating scanning monochromator (mainly CME-Mo151 dual grating monochromator), and accessories such as filter wheels. Xenon lamp light source is a full spectrum light source combined with a continuous monochromator for scientific research. A series of wavelength adjustable xenon lamp light sources have been developed to match multiple monochromators, achieving continuous wavelength adjustment. It is applied in various fields such as material characterization, photoelectric testing, electrochemical analysis, photocatalysis, and IPCE testing.