Human perception of light chromaticity: short-wavelength effects in spectra with low circadian stimulation, and broader implications for general LED sources.

Although light sources are designed assuming the same color sensitivity for all viewers, inter-user variability can in fact cause significant discrepancies in individual perception. Here, perception variability related to short-wavelength effects is investigated. An experimental study is reported on LED sources with reduced blue content, which cause reduced circadian stimulation.