Can a smart city make its public lighting efficient, save energy and prevent pollutant emissions and, at the same time, make it healthy for its citizens? This is the idea embodied in the concept of "human-centered lighting", which has been set up by the Spanish company Setga using Circadionic technology: the light emitted by cities such as Sanxenxo, Pontevedra and Vilagarcía de Arousa are capable of adapting to the heart rhythm of the human being, which is able to adapt to its biological clock. .

 

Light is a key factor in circadian rhythms. According to the National Institute of General Medical Sciences, these are physical, mental and attitudinal changes that the human body follows in its daily cycle. Thus, during the night, the light levels and color levels (CCTs) we receive are very low. These levels detect the brain and start producing more melatonin, a hormone that makes us feel sleepy.

 

Setga, a Galician company, has developed Circadionic technology, which allows the luminaire to obtain different shades for each hour of the day, giving them nuances in the public lighting of the cities, without changing the street lighting.