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. 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
W R G B RWM GWM BWM RWC GWC BWC log[(RWM)/ (RWC)] log[(GWM)/ (GWC)] log[(BWM)/ (BWC)]
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