CRI – COLOR RENDERING INDEX

Color Rendering Index (CRI) measures the ability of a light source to accurately reproduce the colors of the object it illuminates. It's the measurement of light in relation to how it affects the appearance of color. 

Every type of lighting has its place on what's known as the color rendering index chart. This chart measures a scale from 0 to 100, depending on how accurately it can produce light that matches a naturally referenced light source, such as the sun.

When it comes to choosing the right light for your home, CRI for lighting plays a role. You want colors to be crisp and everything to look sharp so that your décor, paint colors and furniture look the best they can. 

It may also affect your eyesight when you're doing certain task like reading a book, watching television or preparing food in the kitchen.

In terms of CRI for LED, most LED lights produce a score of about 80 to 90 on the chart. The result is a brighter room, but with a much more natural, accurate output of light.

CRI Between 0 and 70

Light sources that have a color rendering index below 70 alter our color perception.

Light sources under this index category include:

·       Fluorescent tubes, also known as industrial white tubes

·       Low pressure sodium vapor luminaires

·       High pressure sodium vapor luminaires (with the exception of white luminaires)

·       Mercury-based clear luminaires

CRI Between 70 and 90

These light sources display colors satisfactorily. Some of these are:

·       Standard LED lights

·       Several fluorescent tubes

·       A number of metal halide luminaires

·       High pressure sodium vapor luminaires

CRI Between 90 and 100

Light sources whose CRI is greater than 90 display colors more distinctly and reveal the entire spectrum of color shades. Among them, we find:

·       High fidelity LED lamps

·       A number of metal halide luminaires

·       Incandescent lamps (your basic light bulb and halogens)

Application as per CRI

·       On highways, we can easily install lighting systems that have a CRI below 70 as it is not essential to distinguish colors accurately

·       In residential and office applications, it is always better to select a lighting system that has a CRI greater than 70.

·    A CRI greater than 80 is recommended for an application where precision work is conducted, for example in retail stores and boutiques.

·  When the space requires lighting of exceptional quality, such as in art galleries or medical facilities, it is best to use luminaires that reproduce the color spectrum as faithfully as possible; in these case , the CRI would be greater than 90.

Choose lighting that has a higher CRI rating so you can be sure you're getting the most accurate color portrayal in your home.




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