The human in BioCentric Lighting™

BrainLit’s light environments with BioCentric Lighting™ reproduce natural daylight indoors and provide us with the light conditions that we would normally only get from being outdoors. Our BioCentric Lighting™ environment is developed using the latest developments in scientific and medicinal research focusing on the human need for daylight.

Today, we have the benefit of science in understanding that human beings need daylight for the body’s diurnal rhythm to function properly and stay healthy and feel well. With BrainLit’s light environments, you can enjoy higher energy levels, higher efficiency, and a sounder sleeping pattern. Tiredness and mood-affecting disorders, such as seasonal affective disorder (SAD), decrease during the darker seasons. Moreover, other health concerns, such as diabetes and cardiovascular disease, also show a connection to a lack of daylight.

What happens inside the body?

In modern times, we can spend up to 90% of our time indoors. As a result, we are not always exposed to the amount of sunlight that is needed to stay healthy. Variations in daylight affect the circadian rhythm, which is necessary for the body to function properly. Natural daylight varies in color-scale and intensity throughout the day. During mid-morning, the light takes on a bluish hue that makes us feel energized, whereas the evening brings a reddish hue that enables us to wind down as we prepare for a good and refreshing night’s sleep.


The colder light in mid-morning increases the production of cortisol in the body and decreases the level of melatonin, making the body feel energetic and more focused. The warmer tone in evening light increases melatonin production and reduces cortisol levels, making the body feel relaxed. Variations in light are necessary for maintaining a good diurnal rhythm and higher quality of sleep. It also helps the body to recover strength and balance in vital functions, such as the immune system. The right exposure to daylight enhance the general well-being and increase performance, particularly during the darker seasons.

BioCentric Lighting™ and health

Klas Sjöberg, chief physician, and researcher explains the role of daylight in maintaining health.

“Good light implies a presence of daylight and lighting, which is necessary to perceive the room correctly, for good vision, and for a good diurnal rhythm.”

– According to the Swedish Work Environment Authority’s guideline on “Light and lighting” (external link, in Swedish)