Light is a biological regulator of brain function. It reaches the retina, from where the signal goes to the hypothalamus – the area responsible for the biological clock.
The mechanism of light's effect on the body
Light regulates the secretion of key hormones:
- melatonin – responsible for sleep and regeneration,
- cortisol – affecting energy levels, alertness, and concentration.
This means that lighting parameters directly affect:
- mood and emotional stability,
- ability to concentrate and learn,
- sleep quality,
- stress and fatigue levels.