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How to identify exact light triggered by circadian rhythm cycle

27 August 2020

How to identify exact light triggered by circadian rhythm cycle

Researchers believe that through a study they have found the right solution to control the human circadian rhythm with the exact wavelength. We’ve covered this topic before regarding Human Centric Lighting.

What is the significance of the right light for the health?

This analysis was published in “The Journal of Biological Rhythms” at the end of summer 2020.

It’s probably no secret; exposing a human being to light at night can actually suppress the melatonin hormone. It’s a hormone that is produced in our brains and better known as the “sleeping hormone” helping to regulate sleep and circadian rhythm.

It can have vital consequences and cause circadian disorders and is associated with an increased risk of obesity, diabetes, breast and prostate cancer in worst case. The study resulted in and illuminated that critical blue light signal falls to 438-493nm with a peak at 477nm. This is the missing key to managing precisely these health risks by night light. It consisted of 34 men and women who were exposed to various LEDs or fluorescent tubes in white light over 12 hours timeline. Throughout each night their sleep awake hormone was monitored and measured.

What can we learn from this?

Interestingly, this hormone varied and was incredibly sensitive depending on the unique spectral properties of the light source.

Some believe this study is more credible because it provides a more realistic sense of how people interact with light in the real world.

The analysis has yielded interesting observations, which have major consequences for how artificial lighting must be designed to help optimize human health through the source.