. 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 2.

Comparison between actual R, G, B and W readings and computed based on Actiwatch spectral sensitivity functions.

Illuminants	Illuminance(lux)	Actual Actiwatch Spectral outputs							Computed based on Our Actiwatch
Illuminants	Illuminance(lux)	W	R	G	B	R_WM	G_WM	B_WM	R_WC	G_WC	B_WC	log[(R_WM)/ (R_WC)]	log[(G_WM)/ (G_WC)]	log[(B_WM)/ (B_WC)]
Office fluorescent	580	870	44	85	30	0.051	0.097	0.034	0.086	0.088	0.036	−0.230	0.044	−0.017
Sunny afternoon daylight	7139	4278	385	377	119	0.090	0.088	0.028	0.119	0.078	0.049	−0.123	0.056	−0.245
Standard lamp	753	1528	197	119	43	0.129	0.078	0.028	0.192	0.063	0.024	−0.173	0.095	0.075