An apparatus for identifying differences in the visual and recorded appearance of colors and gray tones illuminated by light sources having different spectral distribution and having: a first image with illumination, with separate and different color elements and with gray scale elements, apertures in the first image adjacent to the elements, a second image with illumination having a plurality of separate elements of color and gray scale, corresponding to the elements of the first image so that the elements on the second image are viewable through the apertures in the first image, with corresponding color and gray scale elements adjacent to one another in the first and second images, and a method of comparing light quality using such apparatus.