Application of the xelsius system and LumiSynth LED to improve photocatalytic Hydrogen Evolution Reactions (HER). Reserach was performed at Institute of Inorganic Chemistry, University of Ulm. Influence of both temperature and irradiation light intensity on the TON (Turn Over Number) was shown with distinct irradiation, wavelength, intensity, temperature, and stirring conditions. Presented at LCP 2024, Lecture of Photochemistry.