Scientific, [ surveying, ] photographic, [ cinematographic, ] optical, [ weighing, ] measuring, signalling, checking and supervision apparatus and instruments, namely, test and measurement instruments focused on colour in the nature of luminance meters, flicker meters, colour temperature meters, colour rendering index (CRI) and correlated colour temperature (CCT) meters, colorimeters, spectrometers and two-dimensional spectral imagers, and light measurement spectrometers, light meters in the ...