Electromagnetic radiation ranges from the cosmic rays of outer space to the electrical waves present in each living plant, animal, and human cell. Visible light is one small part of this electromagnetic spectrum. All biological life is composed of and dependent on light. If you doubt this truth, place most any plant, animal, or human in a darkened environment for a prolonged period of time; you will soon notice that the life energy, the vitality, of each organism is gradually diminished often even to the point of death.
The light energy from the sun of our solar system is chemically and physically integrated into the cellular structure and function of living cells. Albert Szent-Gyorgyi, Nobel laureate for Physiology or Medicine (1937)*, said, “A living cell requires energy not only for all its functions, but also for the maintenance of its structure. The source of this energy is the sun’s radiation.” That energy is absorbed either directly through our skin’s exposure to sunlight, or indirectly thought eating organisms which have absorbed the sun’s energy for proper physiology, such as oxygenation and the conversion of starches to sugars.
Various studies have conclusively shown that humans’ exposure to artificial light, which lacks critical wavelengths that are present in natural daylight, leads to decreases in attention, learning ability, performance, productivity, fertility and increases in (fat) weight gain, errors, and mood swings such as sadness, depression, irritability, stress, and fatigue. Other studies have also shown that exposure to natural daylight results in reduced (fat) weight, resting heart rate, respiratory rate, blood pressure and more, with increased energy, strength, stress tolerance, blood oxygenation, learning ability, test scores, and even customer sales in retail locations!
* The Nobel Prize in Physiology or Medicine 1937 was awarded to Albert Szent-Györgyi for his discoveries in connection with the biological combustion processes, with special reference to vitamin C and the catalysis of fumaric acid.