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The influence of artificial lighting on human health. The effect of lighting on the body

Among environmental factors affecting the body, light occupies one of the first places. Light affects not only the organ of vision, but also the entire body as a whole. The idea of ​​the integrity of the organism, clearly expressed in the works of I.P. Pavlov, is also confirmed by the body’s reactions in response to exposure to light. Light as an element of the human living environment is one of the main factors in the most important medical and biological problem of our time - the body and the environment. Under the influence of light, the physiological and mental reactions of the body are restructured.

Numerous studies of the effects of natural light on the human body have established that light affects various physiological processes in the body, promotes growth, activates metabolic processes, and increases gas exchange.

Light - visible radiation - is the only irritant of the eye that causes visual sensations that provide visual perception of the world. However, the effect of light on the eye is not limited only to the aspect of vision - the appearance of images on the retina and the formation of visual images. In addition to the basic process of vision, light also causes other important reactions of a reflex and humoral nature. Acting through an adequate receptor - the organ of vision, it causes impulses that spread along the optic nerve to the optical region of the cerebral hemispheres (depending on the intensity) excites or depresses the central nervous system, rebuilding physiological and mental reactions, changing the general tone of the body, maintaining an active state .

Visible light also affects immune and allergic reactions, as well as various metabolic parameters, and changes the level of ascorbic acid in the blood, adrenal glands and brain. It also affects the cardiovascular system. Recently, the humoral influence of nervous excitation that occurs during light irritation of the eye has also been established.

Of particular hygienic importance is the bactericidal effect of ultraviolet rays, which are part of the spectrum of sunlight. Under the influence of ultraviolet rays, the development of bacteria is delayed, and with sufficiently long exposure the bacteria die.

The role of the radiant energy of the sun is especially great in the formation of a growing organism. By activating metabolic processes, it promotes proper growth and development. Ultraviolet rays, transforming provitamin D found in the child’s skin from an inactive state to an active one, ensure normal bone formation. Good lighting also has a psychological effect; the abundance of light creates an emotionally uplifted, joyful mood.

Unfavorable lighting conditions cause a deterioration in overall health, a decrease in physical and mental performance. Back in 1870, F. F. Erisman convincingly proved that the development of myopia is a consequence of systematic strain on the organ of vision in low light conditions.

Depending on the spectral composition, light can have a stimulating effect and enhance the feeling of warmth (orange-red), or, conversely, a calming effect (yellow-green), or enhance inhibitory processes (blue-violet).

This is used in the aesthetic design of industrial premises, painting equipment and walls: cold colors - at high temperatures and the presence of heat sources, in hot climates. Warm colors - in case of low temperatures, the need for a tonic influence of the working environment on workers. The most widely used color is green, which has a beneficial psychological effect.

It is no coincidence that issues of rational organization of industrial lighting are included in the chapter “Protection of workers from harmful production factors.” With insufficient illumination and poor quality of lighting, the state of a person’s visual functions is at a low initial level, visual fatigue increases during work, the risk of occupational injuries increases, and labor productivity deteriorates.

According to statistics, on average, in various types of production activities, the number of accidents associated with poor lighting is 30...50% of the total.

Now in the age of scientific and technological progress, radiant energy sources are widely used in the most diverse fields. In this regard, a person is exposed to natural and artificial sources of radiant energy with a wide variety of spectral characteristics and an extremely wide range of intensity: from 100,000 lux or more during the day in direct sunlight to 0.2 lux at night in the light of the moon.

The lack of natural light is associated with the phenomenon of “light starvation.”

Light starvation is a condition of the body caused by a deficiency of ultraviolet radiation and manifests itself in metabolic disorders and a decrease in the body's resistance.

In addition, prolonged work in a room without natural light can have an adverse psychophysiological effect on personnel due to a lack of communication with the outside world and a feeling of enclosed space.

To compensate for ultraviolet deficiency, long-term UV irradiation units (combined with lighting units) and short-term irradiation units (fotaria) are used.

In rooms without natural light, gas-discharge light sources with a spectral composition close to natural, dynamic lighting devices are used for lighting, and special architectural techniques are used that imitate natural light (stained glass, false windows, etc.).

Any work (for example, reading) can be performed in a very wide range of light levels. However, its efficiency (reading speed) will change as shown in the figure.

influence light illumination organism human

Rice.

Up to a certain level of illumination, work cannot be performed (the text is not visible, the reading speed will be zero), then the efficiency of visual work increases and at a certain point reaches a maximum.

A further increase in illumination does not lead to an increase in efficiency (reading speed does not change). The illumination corresponding to this value (the saturation point of the curve) is called optimal illumination.

Many people believe that mixed lighting is harmful to the eyes. However, this is not entirely true. Mixed lighting consists of different wavelengths, this circumstance makes it less desirable than, for example, sufficient natural lighting. But it does not have a negative effect on the human body.

It is harmful to perform visual work with insufficient levels of natural light, and in this case mixed lighting will favor visual functions. Therefore, you should turn on the electric light without waiting until it gets completely dark.

Everyone knows that the power of sunlight is so great that it is able to control the cycles of nature and human biorhythms. Light is actually associated with our emotions, with feelings of comfort, security, but also anxiety and restlessness. However, in many areas of modern life, light is not given the attention it needs. When asked what is most important in life, most people answer health. While healthy eating, fitness and environmental issues are widely covered on the pages of newspapers, magazines and Internet sites, issues of proper and healthy coverage are not addressed at all. The most well-known aspects of lighting are the effects of UV radiation in the summer, as well as its ability to combat winter depression and some skin diseases.

Other lighting issues are discussed only in a narrow circle of professionals, and most people do not think about the wide possibilities of the influence of light on our physical and moral state. The relationship between light and humans has undergone significant changes over the past 100 years with the advent of industrialization. We now spend most of our time indoors with artificial light. Many components of the natural light spectrum that are important for our health are lost when passing through glass. According to light therapist Alexander Wunsch, throughout evolution, humans have adapted to the spectrum of solar radiation and for good health they need to receive the full spectrum. Many people compensate for the lack of sunlight by walking in the park, on the beach or relaxing on the balcony. The effect of seasonal disorder was first described by Dr. Norman Rosenthal. Later, an experiment was conducted among residents of Norway, where night lasts 49 days a year. People living in such conditions often feel tired, find it difficult to wake up and get to work, and many suffer from depression and apathy. But the day when the sun returns is celebrated as the “Day of the Sun” holiday and is greeted with tears of joy. Observations show that there is a specific connection between lighting and the feeling of comfort. They also show that natural light is always more favorable and convenient for all normal activities. Many architectural projects show an absolute disregard for daylight. Office and commercial buildings without windows, in which people spend many hours without seeing the sun and not understanding what time of day and year it is outside. By increasing the penetration of daylight into offices, you can ultimately reduce the number of absences due to employee illness and improve the working atmosphere in the office. Gradually, the situation with lighting aspects in architecture is improving, however, due to insufficient quality education in this area, many architects do not fully take into account the importance of lighting work and planning.

According to Andreas Schulz, a professor at the Hildesheim University of Applied Sciences in Germany, everything depends on the architect, however, the vast majority of projects are built without the involvement of a lighting design specialist. Since the amount of daylight inside buildings is insufficient to satisfy human needs for it, electrical sources are designed to compensate for this deficiency. All artificial light sources try to imitate daylight to one degree or another, some do it very well. Alexander Wunsch studied the effect of different light on humans and came to the conclusion that any deviation from the spectrum of natural light carries the potential for harmful health. Experiments on this topic have been carried out for a long time; in 1973, John Ott studied two groups of children studying in rooms without windows. In one room, the lighting was as close to natural as possible through the use of full-spectrum lamps, while in the other, ordinary fluorescent lamps were used. As a result, children studying in a room with fluorescent lamps were at first hyperactive, and then became very tired and lost the ability to concentrate, and an increase in blood pressure was also noted. Alexander Wunsch recently tested a number of modern artificial light sources for the biological effects they have on humans in comparison to natural light. The professor came to the conclusion that the incandescent lamp has the spectrum closest to the natural one. The results of such studies are rarely known to the general public.

The fact is that most people understand little about such matters. In addition, different cultures value the environment and its gifts differently. For most of us, light is such a familiar accompaniment of our lives that we do not think about its various properties that affect our lives morally and physically. Like air, which we do not notice, light is perceived as a given until we feel a lack of it or discomfort when in contact, for example, with a too bright light bulb. Many people do not realize that they experience fatigue in the workplace due to poor lighting, since it is not always obvious. The general illiteracy in matters of quality lighting is discussed by professionals, including in discussions regarding the need to ban traditional incandescent lamps. In light of current issues of energy saving, the traditional incandescent lamp does not stand up to any criticism and everything is moving towards banning its use.

However, few people talk about the poor spectral and toxicological indicators of compact fluorescent (energy-saving) lamps, which will have to replace the incandescent lamp. Among such discussions, the voices of those who advocate not only saving energy resources, but also talking about people’s health and quality of life are still heard. German lighting designer Ingo Maurer says: "Light is a feeling, and the feeling must be right. Bad light makes people unhappy." According to Ingo Maurer, "Edison's light bulb is a symbol of industry and poetry." Nothing can force a designer to stop using incandescent lamps. "You can't make a lot of money with an incandescent light bulb," says Philips spokesman Bern Glaser. An Osram representative echoes him: “Fluorescent lamps are much more profitable for the company.” Of course, manufacturers strive to increase their income and from an economic point of view this is completely understandable. But still, companies are responding to demand, which dictates the need for more efficient products.

And only our desire to receive better and healthier lighting can lead to the production of such lighting sources by mass manufacturers. All this, however, does not detract from the economical properties of modern lamps, which are many times better than those of an incandescent lamp. In any project, be it an apartment, a store or an office, lighting largely determines the atmosphere and feeling that the interior gives us. Since light effects are perceived subconsciously, we are often not aware of where this or that sensation comes from. Those who consciously use light gain a tool to simulate a sense of comfort, which is especially valuable in places with an oppressive atmosphere, such as tunnels. Many people feel discomfort when moving in a tunnel. In one of the longest tunnels in the world, the 24.5 kilometer Laerdal Tunnel between Bergen and Oslo, the designers used an interesting solution. Designer Eric Salmer divided the tunnel into three sections, at the end of which each traveler will find imitation cave walls with lighting reminiscent of a Scandinavian sunrise.

Thus, you get the feeling that you are passing through three tunnels, and not just one, and the picture of a beautiful sunrise is calming and evokes pleasant associations. In the remaining areas, a conventional lighting scheme was used. Many cannot explain the phenomenon of natural light, but the effect that we feel when we see an imitation painting always works because it appeals to the same feelings. According to Eric Salmer: "Everyone was delighted, and no one could explain it logically. It was just an amazing atmosphere." There are many areas of expertise that lighting professionals can draw from. Knowledge about light can be acquired in the fields of biology, physics, medicine and others. Sometimes specialists in these fields meet at conferences, but often find it difficult to be useful to each other because they do not have a common language and communicate too little with each other. One group of experts are busy in their laboratories developing new light sources that are becoming smaller and more efficient. Another group is working on applying innovation to architectural projects. There is, however, another large group that experiences the advantages and disadvantages of lighting quality firsthand - consumers. While scientists understand light as a specific wavelength that can be measured, designers and architects talk about perception and psychology. However, for the effective and beneficial development of lighting design, it is necessary to take into account knowledge from all areas when working on products and interiors.

Everyone knows that the power of sunlight is so great that it is able to control the cycles of nature and human biorhythms. Light is actually associated with our emotions, with feelings of comfort, security, but also anxiety and restlessness. However, in many areas of modern life, light is not given the attention it needs.

When asked what is most important in life, most people answer health. While healthy eating, fitness and environmental issues are widely covered on the pages of newspapers, magazines and Internet sites, issues of proper and healthy coverage are not addressed at all. The most well-known aspects of lighting are the effects of UV radiation in the summer, as well as its ability to combat winter depression and some skin diseases. Other lighting issues are discussed only in a narrow circle of professionals, and most people do not think about the wide possibilities of the influence of light on our physical and moral state.

The relationship between light and humans has undergone significant changes over the past 100 years with the advent of industrialization. We now spend most of our time indoors with artificial light. Many components of the natural light spectrum that are important for our health are lost when passing through glass. According to light therapist Alexander Wunsch, throughout evolution, humans have adapted to the spectrum of solar radiation and for good health they need to receive the full spectrum. Many people compensate for the lack of sunlight by walking in the park, on the beach or relaxing on the balcony. The effect of seasonal disorder was first described by Dr. Norman Rosenthal. Later, an experiment was conducted among residents of Norway, where night lasts 49 days a year. People living in such conditions often feel tired, find it difficult to wake up and get to work, and many suffer from depression and apathy. But the day when the sun returns is celebrated as the “Day of the Sun” holiday and is greeted with tears of joy.

Observations show that there is a specific connection between lighting and the feeling of comfort. They also show that natural light is always more favorable and convenient for all normal activities. Many architectural projects show an absolute disregard for daylight. Office and commercial buildings without windows, in which people spend many hours without seeing the sun and not understanding what time of day and year it is outside. By increasing the penetration of daylight into offices, you can ultimately reduce the number of absences due to employee illness and improve the working atmosphere in the office.


Gradually, the situation with lighting aspects in architecture is improving, however, due to insufficient quality education in this area, many architects do not fully take into account the importance of lighting work and planning. According to Andreas Schulz, a professor at the Hildesheim University of Applied Sciences in Germany, everything depends on the architect, however, the vast majority of projects are built without the involvement of a lighting design specialist.

Since the amount of daylight inside buildings is insufficient to satisfy human needs for it, electrical sources are designed to compensate for this deficiency. All artificial light sources try to imitate daylight to one degree or another, some do it very well. Alexander Wunsch studied the effect of different light on humans and came to the conclusion that any deviation from the spectrum of natural light carries the potential for harmful health. Experiments on this topic have been carried out for a long time; in 1973, John Ott studied two groups of children studying in rooms without windows. In one room, the lighting was as close to natural as possible through the use of full-spectrum lamps, while in the other, ordinary fluorescent lamps were used. As a result, children studying in a room with fluorescent lamps were at first hyperactive, and then became very tired and lost the ability to concentrate, and an increase in blood pressure was also noted.

Alexander Wunsch recently tested a number of modern artificial light sources for the biological effects they have on humans in comparison to natural light. The professor came to the conclusion that the incandescent lamp has the spectrum closest to the natural one.

The results of such studies are rarely known to the general public. The fact is that most people understand little about such matters. In addition, different cultures value the environment and its gifts differently. For most of us, light is such a familiar accompaniment of our lives that we do not think about its various properties that affect our lives morally and physically. Like air, which we do not notice, light is perceived as a given until we feel a lack of it or discomfort when in contact, for example, with a too bright light bulb. Many people do not realize that they experience fatigue in the workplace due to poor lighting, since it is not always obvious.

The general illiteracy in matters of quality lighting is discussed by professionals, including in discussions regarding the need to ban traditional incandescent lamps. In light of current issues of energy saving, the traditional incandescent lamp does not stand up to any criticism and everything is moving towards banning its use. However, few people talk about the poor spectral and toxicological indicators of compact fluorescent (energy-saving) lamps, which will have to replace the incandescent lamp. Among such discussions, the voices of those who advocate not only saving energy resources, but also talking about people’s health and quality of life are still heard.

German lighting designer Ingo Maurer says: "Light is a feeling, and the feeling must be right. Bad light makes people unhappy." According to Ingo Maurer, "Edison's light bulb is a symbol of industry and poetry." Nothing can force a designer to stop using incandescent lamps.

"You can't make a lot of money with an incandescent light bulb," says Philips spokesman Bern Glaser. An Osram representative echoes him: “Fluorescent lamps are much more profitable for the company.” Of course, manufacturers strive to increase their income and from an economic point of view this is completely understandable. But still, companies are responding to demand, which dictates the need for more efficient products. And only our desire to receive better and healthier lighting can lead to the production of such lighting sources by mass manufacturers. All this, however, does not detract from the economical properties of modern lamps, which are many times better than those of an incandescent lamp.

In any project, be it an apartment, a store or an office, lighting largely determines the atmosphere and feeling that the interior gives us. Since light effects are perceived subconsciously, we are often not aware of where this or that sensation comes from. Those who consciously use light gain a tool to simulate a sense of comfort, which is especially valuable in places with an oppressive atmosphere, such as tunnels.

Many people feel discomfort when moving in a tunnel. In one of the longest tunnels in the world, the 24.5 kilometer Laerdal Tunnel between Bergen and Oslo, the designers used an interesting solution. Designer Eric Salmer divided the tunnel into three sections, at the end of which each traveler will find imitation cave walls with lighting reminiscent of a Scandinavian sunrise. Thus, you get the feeling that you are passing through three tunnels, and not just one, and the picture of a beautiful sunrise is calming and evokes pleasant associations. In the remaining areas, a conventional lighting scheme was used. Many cannot explain the phenomenon of natural light, but the effect that we feel when we see an imitation painting always works because it appeals to the same feelings. According to Eric Salmer: "Everyone was delighted, and no one could explain it logically. It was just an amazing atmosphere."

There are many areas of expertise that lighting professionals can draw from. Knowledge about light can be acquired in the fields of biology, physics, medicine and others. Sometimes specialists in these fields meet at conferences, but often find it difficult to be useful to each other because they do not have a common language and communicate too little with each other.

One group of experts are busy in their laboratories developing new light sources that are becoming smaller and more efficient.

Another group is working on applying innovation to architectural projects.

There is, however, another large group that experiences the advantages and disadvantages of lighting quality firsthand - consumers.

While scientists understand light as a specific wavelength that can be measured, designers and architects talk about perception and psychology. However, for the effective and beneficial development of lighting design, it is necessary to take into account knowledge from all areas when working on products and interiors.

August 15, 2016

Most people spend their working day under artificial lighting. During the day, a person may experience both bursts of activity and fatigue. This happens because our biological clock and light are inextricably linked. It is worth noting that today bio-lighting technologies have been developed that make it possible to control human biorhythms to increase their performance and improve their well-being.

The effect of lighting on the human body

“Bad light makes a person unhappy.” This idea of ​​the German designer Ingo Maurer has been repeatedly confirmed in research conducted by scientists. The influence of lighting on human health cannot be underestimated: low-quality light negatively affects the visual system, causes fatigue, discomfort, migraines, insomnia, and reduces performance.
Light has another important property - it affects our biorhythms. It is known that in natural light human activity is higher than in artificial light. On sunny days, people report higher performance than on a cloudy day. In winter, when daylight hours are shorter, we are less productive than in summer. Exposure to light causes a specific light-sensitive photopigment in the eye to react, which in turn can affect our circadian cycles.


What are circadian cycles?

The circadian cycle is the daily change in biological processes occurring in the human body. This cycle includes periods of sleep and wakefulness, activity and relaxation, productivity and fatigue. Changes in biological rhythms are caused by the action of hormones: melatonin is responsible for sleep, cortisol for activity, dopamine for mood, etc. During the day, the level of these hormones changes, which leads to a natural change in biorhythms. A healthy circadian cycle ensures good health, vigor, mental and physical activity, and adequate sleep.


Manifestations of circadian rhythms

The daily circadian rhythm is expressed in the change of phases of activity of the restoration of all human organs and systems - the heart, brain, nervous system, metabolism. The most vivid change in rhythms is demonstrated by periods of sleep and wakefulness. Other manifestations of circadian rhythms are less noticeable, but they are reflected in a person’s behavior, state of health, periods of activity and fatigue. Thus, it has been established that performance has several peaks during the day, at 10, 15 and 17 hours, and at 22-23 hours the body experiences a physiological decline and adjusts to a resting mode.


Effect of daylight on circadian cycles

Circadian cycles are inextricably linked to lighting. In the evening, when the intensity of natural light decreases, the activity of the hormone melatonin, which is responsible for relaxing the body, increases. The level of activity decreases, the person experiences fatigue and drowsiness. With dawn, exposure to light increases and melatonin levels decrease, and the body gradually enters an activity phase. Its decline, decreased mood, feeling of drowsiness and lethargy, deterioration of health in the autumn-winter period are explained by late dawns and lack of sunlight, since it is these factors that provoke an increase in the level of melatonin and a decrease in the production of the “hormone of vivacity” cortisol. Thus, the intensity of daylight and the biorhythms of the human body are directly dependent. This fact suggests the possibility of harmonizing circadian cycles with the help of lighting.


Controlling biorhythms with office lighting

Most of the day a person is forced to work under artificial lighting conditions. In many offices and factories, there is little sunlight even in summer. In winter, when daylight hours are short, working hours almost always begin before sunrise and end after sunset. Under such conditions, artificial light constantly suppresses the body's production of melatonin. A person does not experience drowsiness, but his periods of activity are less productive: concentration decreases, mood deteriorates. The influence of standard artificial lighting on human activity conditions disrupts the natural flow of biorhythms and negatively affects health and performance.
Hormones that control circadian rhythms can be safely regulated through good lighting. This problem is successfully solved by systems of biologically and emotionally effective light. They are designed to improve a person’s physical and emotional state and health and help him solve work problems more effectively.
The Lighting Technologies company has developed innovative solutions for lighting work spaces. We are talking about controlling the color temperature of lighting devices: it is adjusted based on a specific working situation - “negotiations”, “rest”, etc. It is known that neutral color creates comfortable conditions for solving standard tasks. The cold temperature of the light increases the level of activity, promotes concentration and therefore can be used in cases where complete dedication is required from employees: at important meetings or creative storms. Warm color lighting is necessary for periods of rest when the human body can regain its strength. The system of biologically and emotionally effective lighting allows you to provide a thoughtful and safe effect of light on health. Such light takes into account a person’s circadian rhythms, helps to correctly correct them and effectively spend energy during the working day.
Biologically and emotionally effective lighting has great potential for use in various industries. Considering the climatic characteristics of our country with a characteristic lack of sun in some periods, it is the installation of such lighting that will compensate for the lack of natural light. Positive results on the effect of lighting on human health can be obtained in offices and industrial production due to the increase in the performance of employees. Human Centric Lighting will be effective in rehabilitation facilities, where patients may be in confined spaces for a long time and experience a lack of daylight.
You can learn more about biologically and emotionally effective lighting at.

Light is necessary for a person to live normally. It affects almost all aspects of his life, mental state and physiology. If lighting standards are met, the room is pleasant to be in, fatigue occurs more slowly during work. Otherwise, the mood quickly deteriorates, and other signs of the negative impact of the “wrong” light on the eyes and nervous system appear.

What is illumination

Many people confuse illumination with the brightness of lamps, but this is wrong. The same lighting fixture can create different light levels, depending on the area of ​​the room, the height of the lamp, its angle of inclination.

Brightness, or luminous flux, is measured in lumens. This indicator is on the packaging of the lighting device, but, unfortunately, it is not always reliable. Therefore, to select an energy-saving lamp, it makes sense to take a compact RADEX LUPIN luxmeter with you to the store. The same device will help measure the illumination of your workplace and rooms at home. The parameter reflects the number of lumens of luminous flux per 1 sq. m of surface. It is very important to prevent non-compliance with established standards.

What are the dangers of too little or too much lighting?

It is known that employees of some shopping centers often complain of watery eyes, fatigue and redness. The reason is too bright lighting. On the one hand, it helps buyers get a better look at the product. On the other hand, it harms the health of the visual apparatus of workers who are under such lighting all day long.

When checking light level inspectors make orders only if the indicators do not reach the lower limits of the norm. This is because if the light is too dim, working conditions worsen. A person has difficulty doing work, his eyes get tired quickly, and myopia or farsightedness appears.

However, not only dim light, but also excessively bright light is harmful to the visual system. Consequences of prolonged stay in a room with too much light:

  • Irritation and redness of the mucous membrane (conjunctiva).
  • Feeling of dryness and “powdery” eyes.
  • The appearance of irritability.
  • Feeling of general discomfort.
  • Nervous overexcitation.

It follows from this: it is necessary to monitor not only compliance lighting standards, but also in the absence of a significant excess of the established values.

How measure illumination on one's own

Each of us can provide ourselves with comfortable working and rest conditions. In particular, by creating adequate lighting. To do this, you need to install devices that produce light of normal brightness.

Check if it meets the standard light level your room or workplace, will help lux meter RADEX LUPIN. With this device you can always determine the brightness of light in any room. The measurement is simple. Place the light meter on the control surface with the photosensor pointing upward. The parameter value will be displayed on the device monitor in lux (lx).

The RADEX LUPIN lux meter provides correct information, unlike many other models. The error of its measurements does not exceed 10%. The accuracy of the device is ensured by corrective filters that block ultraviolet and infrared rays that are not perceived by the human eye. Since the spectrum of some light sources contains both, illuminance measurement without filters it turns out inaccurate. The RADEX LUPIN lux meter meets the requirements of GOST. Its spectral sensitivity is the same as that of the human eye, so it provides complete, reliable information about the light environment.

Briefly about lighting standards

Lighting in which a person maintains working capacity for a long time and does not notice an unreasonable deterioration in well-being or mood is considered normal. For control lighting standards The Chief State Doctor of the Russian Federation approved special sanitary rules and regulations. The document establishes clear requirements for lighting in premises for various purposes.

Standards for some of them (in suites):

  • Bathrooms, bathrooms - 50.
  • Sleeping quarters - 100.
  • Living rooms and kitchens - 150.
  • Gyms - 200.
  • Playrooms for kindergartens - 200.
  • Office space - 300.
  • Classrooms - 300.
  • Library premises - 400
  • Doctors' offices and treatment rooms - 500.
  • Trading rooms - 500.

The highest requirements are set for premises in which work of the highest precision is carried out. For example, for jewelry, engraving and watchmaking workshops, the illumination level should be 3000 lux. The lighting of storerooms, basements, attics, passage corridors and other rooms with short stays of people (20-30 lux) can be relatively dim.