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UVA1 emission spectra. In the (a) in vitro and (b) in vivo studies, UVA1 rays were delivered using an Oriel solar simulator (1,000 W and 1,600 W, respectively) equipped with a dichroic mirror and a WG360 2 mm thick filter. Emission spectra were recorded using a calibrated Macam spectroradiometer. To deliver all of the UVA1 wavelengths (up to 400 nm), a part of the visible light spectrum (400–450 nm) could not be separated from applied UVA spectra of wavelengths.
