Evidence supporting HCL?

The 2017 Nobel Prize in Physiology or Medicine was awarded to Jeffrey C. Hall, Michael Rosbash, and Michael W. Young, for their discoveries of molecular mechanisms controlling the circadian rhythm.*

Supporting evidence to Human Centric Lighting (HCL) has been measured in three environments:


  • Two-year increase in employee retention.

  • 19% increase in productivity.

  • 1% less sick days.


  • 10% reduction in ADHD related costs.

  • 18% improved treatment efficacy for mental disorders.

Medical Sectors

  • 1% savings on general health care costs due to higher physical robustness.