DIN 5031-100 ”Optical radiation physics and illuminating engineering - Part 100: Melanopic effects of ocular light on human beings – Quantities, symbols and action spectra“ was published in September. The document replaces its preliminary standard DIN/TS 5031-100. It contains a comprehensive description of quantities, symbols and the spectrum of effects of the nonvisual effects of light on humans mediated by the eye.

Users now have access to a German standard that describes the spectrum for evaluating the melanopic effect of light and specifies age-dependent correction factors for the eye as well as material-dependent correction factors for transmission and reflection. The standard is in line with international standards such as CIE S 026:2018 and CIE 015:2018. The new informative Annex E describes melanopic effects as a function of spatial light distribution.