Understanding the IRC/CRI/Ra (Color Rendering Index) in lighting

IRC, CRI or RA are different names for the same concept. CRI , or color rendering index, is a measurement that evaluates the ability of a light source to faithfully reproduce the colors of illuminated objects. It is therefore a confidence index allowing us to know if the light brings out the real colors of the objects.

The higher the CRI, the more the light brings out the true colors of objects.

CRI is set on a scale of 0 to 100, where 100 is perfect color reproduction. A light with a high CRI will be of quality, ideal for environments where color accuracy is crucial. On the other hand, a low CRI will cause color distortion: the rendering of objects will be very far from that of a natural light source; colors will be faded or altered.

CRI of 90-100 : excellent color rendering
CRI 60-90: some color distortions but not noticeable to the naked eye
CRI 0-60: visible color distortions

Thus, CRI becomes an important factor to consider when choosing bulbs or lights, especially in contexts where accurate color reproduction is essential, such as in artistic or medical fields.

What types of lights have an ideal CRI?

LEDs have never been more popular thanks to their energy savings and bright lighting. In terms of CRI, most LED lighting has a CRI of 80 to 90+ and will produce a more natural and precise result, glowing skin, "honest" colors.

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In summary

CRI is like the judge of light quality, indicating how well it can bring out true colors. A high CRI is generally preferable when accurate color reproduction is necessary, while a low CRI may result in degradation of visual quality.