LED and human health
Humans Factor In Lighting, also known as comfortable Lighting, refers to the idea that the light changes with the rest of the body, and the idea originated In Europe. The aim is to enable people to live in a comfortable lighting environment. LED is a light source which can be adjusted according to biological cycle, but it still needs to take into account spectral distribution and color temperature conditions.
Light is not the only factor that affects Circadian Rhythm, but it is a key one. Scientists believe that lighting can affect your mood and health because a sunny day doesn't have to be compared to a dull, rainy day.
LED light contains less ultraviolet and infrared light and produces less radiation (common lighting lines contain ultraviolet and infrared light). For example, blue light belongs to cold white light, which is close to natural light and can be applied to students' classrooms and offices. But prolonged exposure to blue light also inhibits the growth of melatonin, affects sleep quality, the immune system and can lead to physical changes such as cancer.
Scientists studying the effects of blue light on healthy adults have found that blue light inhibits melatonin production, disrupts sleep, affects quality of life, affects physical and mental health and makes people susceptible to illness. Previous research on sleep disorders in children and adolescents has shown a clear and persistent link between sleep disorders and the use of digital devices.
Lighting design cannot only consider color temperature
In the design of LED lighting, the spectral energy distribution and color temperature should be taken into account. The color temperature is in the unit of absolute temperature K, representing the spectral components of different light sources. The color temperature of blue ray falls above 5300K, belonging to medium and high color temperature, with a sense of brightness; On the contrary, red and yellow light belong to the warm color light, the color temperature is below 3300K, let a person have warm, healthy and the feeling that makes a person relaxed, suit to use at home.
However, under the same color temperature, different viewers and other factors, such as climate and environment, may have different spectral distributions.Spectral energy distribution are the key factors affecting the human eye and body.
The national sleep foundation recommends no more than 30 minutes of tech before bed and no tech in the bedroom.