In the TM-30 measurement of Yujileds AP series LED. The color fidelity index achieves 98, and looking into more details, we see that the 99 CES colors are all rendered above 95, when compared to a standard high CRI LED, even if the CRI is the same, it is still easy to tell the obvious difference of Rf, especially the 99 fidelity scores, not to mention the standard 80 CRI LED.

With the fast development of spectral engineering technology based on LED, it is more and more difficult to judge the color rendition only by CRI. More comprehensive metrics have to be involved as primary or alternative evaluations.