title: Study on the correlations between color rendering indices and the spectral power distributions: comment.
abstract: This is a comment on a recently published paper by Lin at el. [Optics Express 22(S4), A1029 (2014)]. The original article suffers three fatal defects as follow: (1) Some peak distortions are not present in the spectral loss simulation due to large wavelength step; (2) The correlations between the modulated deviations (MDs) and the color rendering indices (CRIs) are poor at high CRI region; (3) How to determine the optimal peak wavelengths of multi-peak LED in the guideline for the CRI optimization does not make any statement. There are poor correlations between the MDs and CRIs at high CRI region.
authors.forename: Guoxing
authors.initials: G
authors.lastname: He
authors.forename: Ju
authors.initials: J
authors.lastname: Tang