UGR: What is it and why is it important?
UGR is an extremely important term in Enlightenment. However, many people do not know what it is. Have you ever looked at a light source, such as a lamp, and felt visual discomfort, as if you were dazzled? So that light source had too high a UGR. In today's article we will explain all the details about the UGR and why it is so important when selecting your lighting.
The acronym UGR stands for Unified Glare Rating, which in Portuguese can be translated as Unified Glare Index. The UGR rating helps determine how likely a fixture is to cause visual discomfort to people.
Glare is the visual sensation produced by bright areas within the field of view. And it's important to limit it, as it can cause eyestrain, errors, and even accidents.
Glare can be classified as uncomfortable, debilitating, or reflective. Uncomfortable glare often arises directly from bright light fixtures or windows inside workplaces. Debilitating glare is most common in outdoor lighting, but can also occur in spot lighting or intense bright sources, such as a window in a relatively dimly lit space. Reflected glare is caused by reflections on surfaces.
It is considered that the lower the value, the less discomfort or glare the user will feel with the lighting in question.
To control glare, the International Commission specifies the maximum values allowed for different types of applications. In general, the ideal UGR for the different zones is as follows:
The acronym UGR stands for Unified Glare Rating, which in Portuguese can be translated as Unified Glare Index. The UGR rating helps determine how likely a fixture is to cause visual discomfort to people.
Glare is the visual sensation produced by bright areas within the field of view. And it's important to limit it, as it can cause eyestrain, errors, and even accidents.
Glare can be classified as uncomfortable, debilitating, or reflective. Uncomfortable glare often arises directly from bright light fixtures or windows inside workplaces. Debilitating glare is most common in outdoor lighting, but can also occur in spot lighting or intense bright sources, such as a window in a relatively dimly lit space. Reflected glare is caused by reflections on surfaces.
It is considered that the lower the value, the less discomfort or glare the user will feel with the lighting in question.
To control glare, the International Commission specifies the maximum values allowed for different types of applications. In general, the ideal UGR for the different zones is as follows:
- Zones for technical drawing UGR <16
- Offices UGR <19
- Reception areas UGR <22
- Archives, stairs and elevators UGR <25
- Corridors and passing places UGR <28
It is important to take this information into account when selecting your lighting, according to the division in question.