What is the CRI color rendering index? What role does this index play in helping you make an LED purchasing decision? Let’s learn about the color rendering index with VONTA in this article!
What is the CRI color rendering index?
Image display level of CRI color rendering index
Color Rendering Index (CRI) is an index that accurately reflects the lighting quality of a light source. Each light source has a different CRI index. The higher the CRI of the light source, the more accurately the color of the illuminated object will be reflected. The sun is the light source with the highest CRI = 100.
Application of CRI color rendering index in practice
As mentioned above, the higher the CRI color rendering index of the light source, the better the color of the object receiving the light. Therefore, the colors of objects become clearer and more realistic, bringing a pleasant feeling to the eyes, without causing eye strain, helping to protect eyesight.
Besides, based on the high and low CRI index, you can easily choose the right type of LED light for the space.
For example:
- For LED lights for bedrooms, garden decorations, etc., you can choose lights with CRI <50.
- When choosing residential lighting, you should choose CRI from 50-80.
- For lights used to illuminate factories, street lights, etc., spaces that require strong lighting should choose lights with CRI > 85.
- To decorate showrooms, stores,… that need extremely strong lighting to highlight products, you can choose lights with CRI up to 90.
Use the CRI color rendering index to choose LED lights suitable for the space
Show you how to determine the CRI index of LED lights
There are 3 basic ways to help you determine the CRI index accurately.
Method 1: Use the naked eye
You use a colorful picture and observe with lamp light and daylight to see the difference.
Under the light of an LED light, if the above picture has a clear color change compared to when viewed in daylight, it proves that the light has a low CRI. If the picture has a slight, insignificant change, the LED light has a high CRI.
Method 2: Use the camera
You use the camera to take pictures of blue/red objects under sunlight (with CRI=100) then take pictures of them under LED light without turning on the Flash.
Now, you bring the two photos into Photoshop and check the color difference. If the two photos are not too different, the LED light has a CRI index of >80. If they have a distinctly different dark color, the lamp has a CRI <70.
Method 3: Use measuring equipment
You can use a specialized meter to determine the most accurate color rendering index.
For LED products of VONTA electrical equipment, the packaging contains specific information about color rendering index CRI, capacity, light type, etc. So that you can easily choose products suitable for your intended use.
