Figure 10
From: Correlated color temperature is not a suitable proxy for the biological potency of light
Chromaticity of the “Full” dataset, filtered for Rf ≥ 70, plotted in the CIE 1931 (x,y) chromaticity diagram. The b-y spectral opponency of the CS model manifests strongly in chromaticity space cutting the 3500 K and 4000 K Basic ANSI quadrangles diagonally. The yellow dashed line indicates the limit of the “yellow wins” dataset (circle markers) which is hidden by the “blue wins” dataset (triangle markers). When this line representing the boundary of the b-y spectral opponency is extended, it intersects the spectrum locus near 500 nm which is near the crossover wavelength of the functions that the CS model uses to determine “blue wins” (rBY+) or “yellow wins” (rBY-).
