Additionally, the emission intensity of the HS state compared to the LS state is higher near the SCO region. (Fig. ) Further PL experiments were carried out to explore the luminescence behavior of the photoinduced metastable HS state at 10 K after irradiation over 2 hours, where a significant increase in the emission intensity (19.8%) was noticed, which was consistent with the magnetic response under light irradiation at 10 K. Thermal stability of the photo-induced HS state was further studied by PL measurement, where PL intensity decreased upon increasing the temperature where emission spectrum at 40 K overlapped with the spectrum obtained before irradiation at 10 K.