Does two light sources with equal CCT and DUV but diiferent CRI and SPD look the same on the human eye/camera ?
Example:
Source A: ordinary white LED with blue spike @6500K with Duv -0.002 and CRI 80
Source B: Optisolis @6500K with Duv -0.002 and CRI 98
would the color of Source A and Source B be the same since they have the same CCT and Duv, essentially same XY value.?
Not the same on either count. The human eye picks up much more information than CCT and duv, so does the camera. The low CRI would seem inexplicably pale even on a white wall, and the high CRI would have a soft and rich feeling.
so that means a Fluorescent lamp with CCT=6500K, DUV= -0.001, CRI=70 would have a different “COLOR” to an Optisolis LED with similar CCT=6500K and DUV= -0.001 but with a different CRI of 98 ?
I asked because CIE 1931 only defined color in terms of X (CCT) and Y (DUV) coordinates, and it seems that CRI was not considered.
Because it is enough under the constraints of the specific observer. It’s not enough if you include the remission from illuminated objects and the individual variances of the human.
CIE 1931 is a very simplified model of how “color” works, however you define the term “color”. The human eye picks up much more info than that. The CCT and duv cannot specify the space of all colors, the same way the mean and variance cannot specify the space of all probability distributions.