The document summarizes an experiment investigating how photon energy affects isotopic ratios during ozone formation. Oxygen gas was exposed to light from mercury, hydrogen, and planned krypton lamps at different energies, and the resulting ozone was analyzed. Preliminary results found enrichment of 17O and 18O isotopes consistent with literature. Reducing a step in the Chapman cycle reaction had no effect. Future experiments are planned to gain more insight, such as using higher energy krypton light and temperatures, to test the resonance effect hypothesis. The anomalous mass-independent isotope effect seen in ozone formation still lacks a full explanation after decades of research.