From Thomas Edison’s empty glass bulb to AI-controlled LEDs, hundreds of years of constant evolution have passed, which culminated in what we now know as artificial lighting. Edison could not have imagined how dependent we would become on his invention almost two centuries later. It led to a way of life where we spend up to 90% of our time in enclosed spaces deprived of natural light, such as shopping centers and offices. Places where artificial light remains constant throughout the day, without any variation of color temperature or luminous intensity are where artificial lighting practically eliminates day and night differences.
However, with the evolution of studies on our well-being, especially regarding the direct relationship between natural light and metabolism, it has been proven that artificial light should go much further than just helping us see. It can also help maintain our body working correctly both biologically and psychologically. Research indicates that the “biological clock” influences daily activities. Light variations – from sunrise to sunset – send precise signals to the brain that interprets them and transmits them to the human body, triggering specific responses. Blood pressure, body temperature, and hormone production vary over 24 hours and according to the visual information we receive from light. In this context, a light source that does not change throughout the day does not fit with the human body since different light stimuli are necessary to perform daily functions more accurately.