Table 1.

Relative Stimulation of the Three Cone Types by the Flash and Background Colors

	L	M	S
Flash (equal photopic luminance)
Red	1.18	0.16	0.0002
Green	0.87	1.27	0.24
Blue	1.32	2.54	12.0
White	1	1	1
Background (equal scotopic luminance)
Blue	0.33	0.62	1.48
White	1	1	1
Yellow	1.20	1.19	0.33

L, M, and S values are relative to the excitation provided by the white light, calculated using 10° cone fundamentals. The blue LEDs used for the background had a peak wavelength of 472 nm as opposed to the blue LEDs used for the stimulus, which had a peak wavelength of 462 nm.