“…blue light is neither good nor bad; it’s merely a fact of life in nature and increasingly — with the proliferation of blue-rich LED lighting — more artificially illuminated spaces. But an ever deeper understanding of it and other spectral components of light, combined with continued advances in LEDs and lighting sensor/control technology, is opening a new frontier in lighting solution design. It even has a name — one coined to try to convey the need and growing ability to take a more enlightened approach to illumination — human-centric lighting or HCL.”

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Tom Zind. “The Human-Centric Lighting Debate” Electrical Construction & Maintenance (EC&M) Magazine.. Apr 16, 2018. http://www.ecmweb.com/lighting-control/human-centric-lighting-debate