Table 1.

Light sources used in this study

	Radiometric and photometric values (380–780 nm, inclusive)		Retinal photopigment-weighted illuminances (α-opic lux)
	Photon flux (photons/cm2/s)	Irradiance (µW/cm2)	S cone	Melanopsin ipRGC	Rod	M cone
White fluorescent (4100 CCT)	2.39 × 1015	854	108	1424	1701	1887
White LED (5000 CCT)	2.33 × 1015	839	12	1853	1998	2084

CCT, correlated color temperature