CRI （Color Rendering Index）
While it is an important benchmark,CRI alone is not enough for measuring the quality and aesthetic of light.CRI measurements take into account only the R1-R8 measurements on the Color Rendering Index,which are the least saturated colors in the spectrum.
The full CRI scale includes saturated colors and goes all the way to R15,and positions on the color scale significantly reflect the quality of light we perceive. True,vibrant rendering of reds-R9 on the scale-is one of the key factors in reproducing the rich"color of life"from an artificial light source. Adequate R9 performance is often missing from LED components for lighting applications,even those that advertise a high CRI.