Light Quality

tags:: Lighting on/working Health & Fitness

Good overview.
https://hoarelea.com/2019/01/15/the-ultimate-guide-to-circadian-lighting/

Brightness of lights and color temperature affects perceived negativity of faces. Warm light = people are friendlier.

https://www.nature.com/articles/s41598-021-93523-y

Under cool lighting, there's significant alertness improvement. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6295624/

We need to reduce the blue component in LEDs for human safety. Emulate black body radiation. Prefer starting from warmer and cooling down.

Further tuning its chromaticity from black-body-radiation- to sunlight-style, the 2000 K LED can be made 303% safer in terms of maximum retina permissible exposure limit or 100% better in terms of melatonin suppression sensitivity. - Approach for Designing Human-Centered and Energy Saving Lighting Luminaires