Illumination level

The illumination also affects the psychological well-being of a person depending on the luminance of the luminaire, chromaticity of lighting, uniformity of luminance and colours used in the environment itself. The correct lighting should be able to convey information necessary to carry out work tasks, to motivate, to set positive mood or creative atmosphere. The opposite then creates a probability of failure, injury, eye strain and tiredness.

Great care should be taken to avoid the possibility of eye strain, which leads to safety threats. This can be caused not only by improper illumination level, but for example also by flicker of fluorescent light, caused by faulty or cheap electronics that is driving these light sources.

Task area is the most important space in terms of illumination quality. The illumination of the task area should take into account the type of work being done, the focus it takes to carry out the task and also other demands. While the correct illumination of the task area is of paramount importance, for the human well-being also its immediate surroundings have to be taken into account.

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Comfortable working or living environment can be beneficial for work productivity and the ability to relax and regenerate. The employee should feel well in his working environment. Illumination is an important factor to provide such comfort, improving the performance while reducing the risk of injuries from either bad visibility or stress caused by uneven illumination levels across workplace.

The illumination also affects the psychological well-being of a person depending on the luminance of the luminaire, chromaticity of lighting, uniformity of luminance and colours used in the environment itself. The correct lighting should be able to convey information necessary to carry out work tasks, to motivate, to set positive mood or creative atmosphere. The opposite then creates a probability of failure, injury, eye strain and tiredness.

Great care should be taken to avoid the possibility of eye strain, which leads to safety threats. This can be caused not only by improper illumination level, but for example also by flicker of fluorescent light, caused by faulty or cheap electronics that is driving these light sources. Low frequency flicker at 50 Hz is especially tiring and can lead to repeated errors and severe eye strain, which in the end may require medical attention. In such case replacement of the luminaires for higher quality ones is advised.

In extremely sensitive persons the frequent flicker can even lead to epileptic seizures. With increased tiredness the probability of epileptic seizures increases as well, making these faulty set-ups a health risk especially in larger areas with many workers. Such lighting failures can also produce unwanted effects in retail areas and in every other environment where a significant number of people are present.

For optimum performance the goal should be to mimic natural light as closely as possible or to even utilize it. This could be tricky given that prevention of glare is also required and glare-reducing glass finishes may negatively affect the quality of light.

Persons with disabilities may have different demands for illumination levels to carry out their tasks correctly, calling for dynamic lighting systems. These can adapt to the requirements of different types of workers. With digitally controlled lighting this task is even easier to achieve, further removing obstacles for employing disabled or elderly persons. For the visually impaired there can be stricter demands on illumination or contrast levels.

To keep illumination level constant and in line with the standards lighting sensors can be employed. These can keep the illumination levels constant even with deterioration of light source quality over time. Daylight sensors can then help mix artificial and natural light, keeping the illumination level constant as desired while helping to achieve significant energy savings during sunny days.
 



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