Supplementary material to article by J. M. Kim et al. ”Light-emitting Diodes at 830 and 850 nm Inhibit Melanin Synthesis In vitro” Forskolin (+) Forskolin (- ) 830 (nm) 20 (J/cm 2 ) 940 (nm) 2 (J/cm 2 ) 850 (nm) 1 (J/cm 2 ) No irradiation No irradiation Fig. S2D. Effects of light-emitting diode wavelengths on cellular tyrosinase activity were determined according to L-DOPA stainability. Acta Derm Venereol 92