Science shows that there are certain wavelengths in light that trigger cyclic physiological and neurological responses.
When we are exposed to sunlight, our eyes interpret the wavelengths and send signals to our brain to trigger neurological and physiological functions – such as hormone production, sleep, healing, and metabolism. The regularity of the sun keeps our internal clock stable and regular, supporting wellbeing and health through a consistent sleep/wake cycle.
This was much easier before the industrial age, when humans migrated to an indoor environment, getting away from outdoor lifestyles that were dictated primarily by the day/night cycle.
Today, we spend approximately 85% of our time indoors, often under electrical lighting that is not like the natural sun and insufficient to send the right signals to our brain to maintain alertness during the day but postpones melatonin production (the sleep hormone) at night. This throws our bodies into dysrhythmia, a disorder that can lead to cognitive and metabolic issues, fatigue and sleep disorders as well as lowered energy, performance and alertness during the day.