According to the WELL Guide, which of the following represents the wavelength for green-blue versus green-yellow light?
a) Green-blue: 480-500 nm, Green-yellow: 570-590 nm
b) Green-blue: 500-520 nm, Green-yellow: 580-600 nm
c) Green-blue: 490-510 nm, Green-yellow: 560-580 nm
d) Green-blue: 460-480 nm, Green-yellow: 530-550 nm
