Color Rendering Index

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In general terms, CRI (Ra) is a measure of a light source’s ability to show object colors “realistically” or “naturally” compared to a familiar reference source, either incandescent light or daylight.

None of the 8 test colors used to calculate CRI are saturated. So, CRI is a poor measure for indicating how well a light source illuminates saturated colors.

Even with a high CRI (Ra), color rendering of saturated colors can be poor. LEDs that deliver 90+ CRI and high R9 values provide accurate and consistent color.