BLOG

What is CRI?

With the development of technology, attention is paid to different and important parameters in the lighting of the environments we live in. While designing lighting systems in environments where lighting systems will be used today; A lot of attention is paid to parameters such as color, texture and light. In this context, the CRI plays a key role.

CRI stands for Color Rendering Index. Its Turkish equivalent is Color Rendering Index / Index. CRI is a criterion that indicates the visual performance of any light source and is important in lighting systems. With CRI, the ability of artificial light sources to reflect colors according to sunlight is measured. Since CRI is a very important parameter, there are questions about CRI that need to be answered.

Bu yazımızda sizler için CRI Değerleri Nelerdir, CRI Nasıl Ölçülür ve CRI Değeri Neden Önemlidir sorularına cevap vereceğiz.

What are CRI Values?

CRI values are expressed numerically from 0 to 100. A high CRI value indicates that the light source displays colors well. In other words, the closer the CRI value is to 100, the better that light source shows the colors. The CRI value cannot be above 100, the highest CRI value is 100. A CRI value of 100 is considered as sunlight represents the best light.

CRI values are generally evaluated in 3 categories. These;

• CRI Values between 90 – 100: It is the best CRI value range where colors can be perceived most accurately. Sulfur lamp, incandescent lamp and halogen lamp are examples.
  
• CRI Values between 80 and 90: Used in areas where good color rendering is required. It is the color rendering index value range that can be considered good. Led lamps and three-component phosphor fluorescent types are examples.
  
• CRI Values from 0 to 80: Since it has a wide range of values, it can be divided into good and bad in itself. Generally, a range of 60 to 80 is considered good, while a range of 0 to 60 is considered bad. Fluorescent lamps and LED lamps are examples of what is considered good. Dnat lamps (sodium) and DRL lamps (mercury) are examples of what is rated as bad.
  

How is CRI Measured?

When measuring CRI, the average color vision rate of measurements made in 14 colors under an artificial light source is taken into account. In other words, the average color vision rate allows us to obtain the CRI value.

The color rendering index, or CRI, is measured with a portable measuring device with a spectral sensor. A spectral sensor measuring device is also known as a spectroradionmeter. This device is directed to the light source and the CRI value can be measured easily. With these devices, color rendering index can be easily measured and evaluated in different areas.

Why is the CRI Value Important?

Color rendering index is very important in lighting systems. Some of the reasons why the color rendering index is important are as follows;

• Since it is directly related to the eye's vision, the higher the CRI, the greater the eye's ability to see.
  
• It is very important for eye health. Eye health can be seriously damaged if you spend years in environments that do not have a CRI value.
  
• Increases work efficiency in business areas where visual performance is important.
  
• The environment we see directly affects our psychology. Therefore, environments with a healthy CRI value provide visual comfort and positively affect the psychology of the person.
  
• Accidents caused by problems such as blindness, wrong or incomplete vision decrease as the CRI value increases.
  
• In environments with a high CRI value, we can see everything more naturally.
  

In this article, we have answered the questions of What are the CRI Values, How is CRI Measured and Why is the CRI Value Important? For more information about our products and services, you can contact us using one of our communication channels.