Fig. 2
From: Suppression of vagal cardiac modulation by blue light in healthy subjects
Spectral irradiance distributions of colored OLED lights (a) and melanoptic spectral efficiency curve adjusted for human pre-receptoral filtering (b). a Data were measured at the place of the subject’s eyes, i.e., 24 cm below the surface of OLED lighting module. b Generated from data in reference [8]. Vertical dashed lines in both panels indicate the position of λmax of the adjusted melanoptic spectral efficiency (490 nm)