Melanopic Limits of Metamer Spectral Optimisation in Multi-Channel Smart Lighting Systems

Modern indoor lighting faces the challenge of finding an appropriate balance between energy consumption, legal requirements, visual performance, and circadian effectiveness a spectrum. Multi-channel LED luminaires have option keeping image-forming metrics steady while varying melanopic radiance through metamer spectra for non-visual purposes. Here, we propose theoretical concept automated smart system that is designed to satisfy user’s preference neural networks triggering pathway via metamers. To quantify limits metamers at chromaticity point, used 561 coordinates along Planckian locus (2700 K 7443 K, ±Duv 0 0.048) as optimisation targets generated by using 6-channel, 8-channel, 11-channel combination three different luminance levels. We found in best-case scenario, can be varied up 65% constant (?u?v??7.05×10?5) spectra. The highest contrast reached near 3292 4717 within Duv range ?0.009 0.006. Additionally, publish over 1.2 million optimised multichannel open-source dataset with this work.