A key to how to understand how light affects sleep? - China lighting network

A survey of 1000 adults, 77% of respondents think lighting will affect their productivity in the workplace, while 33% said they get natural light is important, 32% of people said they were willing to work under artificial lighting will help improve productivity. The survey also found that, in the home, 31% of respondents think before you go to sleep easily a quiet atmosphere, lighting is very important, while 38% of people think that the bedroom in the morning light can help them full of vitality. Europe is actually because of the importance of lighting goes far beyond our imagination. European lighting association believe lighting system, better light quality, people-oriented, and sustainable development is a driving force of the European lighting market growth. For lighting purpose has been in the field of commercial and home lighting have found wide applications such as office, school, restaurant, etc, and in the health care environment has made greater progress, for example, a specially designed LED lighting to help reduce the drug dependence of mental patients, improve dementia care, etc. Emphasis on high quality and the spectrum close to natural light, and fusion of human intelligent control technology, cooperate with the person for engineering visual requirements for lighting, is becoming a trend in the future. So, as a person because one of the most critical in lighting, lighting and how affect our sleep? This and our body to light color perception has a great relationship. First of all, the light color of the retina imaging reaction by photosensitive retinal ganglion cells ( 内在光敏视网膜神经节细胞

ipRGCs) The inner black apparent protein ( Melanopsin) And external rod cell ( 棒) And cones ( As Cones, red, green and blue) And after adjusted, converts the signal to the brain. When the brain receives signals, five kinds of photoreceptor cells in accordance with their respective photosensitive pigment ( R rod protein; SC cone protein; MC cone protein; LC cone protein; M black opsins) The sensitivity of the light frequency weighted calculation, and obtain illuminance value, to quantify the light effect of biological rhythm. We are familiar with melatonin, also known as the sleep hormone, it dominates the operation of the human body biological clock, secrete less during the day, make human body to stay awake; Night had more, let a person feel tired, produce drowsiness. The black apparent protein ( Melanopsin) Is responsible for the visual function adjustment, such as biological clock, the release of melatonin ( Melatonin) And so on. Therefore, the light intensity is strong, colour temperature affects people's circadian rhythms, hormone secretion, and other external behavior. This is light therapy can effectively mediate the phenomenon such as depression, sleep disorders of biology. So, how will these photoreceptor protein quantitatively, so that we can detected? In fact, the above mentioned five kinds of light-sensitive pigment have corresponding illuminance parameters, we through the detection of illuminance value, can quantify the lighting effects on human physiological function, one of the most important point is to sleep. 1, melatonin, intensity of illumination, Melanopic勒克斯) :

by quantitative light on black apparent protein ( Melanopsin) The response of the degree of stimulation light measurement. The higher the numerical show that melatonin is secreted less, people are less likely to be tired. 2, melatonin close light ( 梅尔·日光勒克斯) : the parameters to simulate the CIE

D65 daylight to calculate the 'most conforms to the sun' indoor lighting environment. If the space designers want to create a full spectrum of sunlight atmosphere, recommended to the value. 3, SML cones & R rod cell illumination ( Cyanopic、Chloropic Erythropic Rhodopic勒克斯) :

the parameters through the environment light quantified photoreceptor cells, to analyze the effects on the biological. Generally used in the health care professional purposes, such as eye research, etc. 4, melatonin illumination ratio ( Melanopic比率) : this parameter reflects the melatonin illuminance ( Melanopic勒克斯) With bright visual illumination ( 明

照度) The relationship between. When the higher the value, the light intensity suppress black apparent protein ( Melanopsin) The stronger, the less melatonin secretion, the more sober. YanZhiXiang

the expert said the author AnZhenJi