. Author manuscript; available in PMC: 2015 Mar 11.

Published in final edited form as: Chronobiol Int. 2014 Oct 7;32(2):270–280. doi: 10.3109/07420528.2014.966269

TABLE 3.

Comparison between predicted photoreceptor excitations from the regression models and computed from the spectral distributions of the light sources.

Illuminants	Photoreceptor excitations					Actiwatch outputs				Predicted photoreceptor Excitations
Illuminants	S	M	L	R	I	W	R	G	B	S_P	Error	M_P	Error	L_P	Error	R_P	Error	I_P	Error
Office fluorescent	294	182	398	393	328	870	44	85	30	358	0.085	264	0.161	606	0.183	468	0.076	333	0.006
Sunny afternoon daylight	6158	2411	4728	6707	6477	4278	385	377	119	1279	0.682	1400	0.236	2879	0.215	3209	0.320	2696	0.381
Standard lamp	258	223	531	483	417	1528	197	119	43	509	0.296	487	0.340	1041	0.293	1147	0.375	1004	0.382