Suppression of vagal cardiac modulation by blue light in healthy subjects

Table 1 Characteristics of light sources

	Red	Green	Blue^a	Blue 5	Blue 2
Illuminance, lx	39	71	10	5	2
Irradiance, W/m²	0.20	0.14	0.07	0.03	0.01
Chromaticity (x, y)	(0.63, 0.34)	(0.33, 0.62)	(0.14, 0.16)	(0.14, 0.16)	(0.14, 0.16)
Photon flux density, μmol/(m² s)	1.05	0.64	0.26	0.13	0.05
Melanopsin-stimulating photon flux density, μmol/(m² s)^b	0.00	0.10	0.20	0.10	0.04

^aBlue light with 10-lx illuminance was used for both studies 1 and 2
^bCalculated from melanoptic spectral efficiency adjusted for human pre-receptoral filtering [7, 8]

ISSN: 1880-6805