Note that due to how CRIs are calculated, you can have an arbitrarily bad color rendition even with any CRI <100 with discontinuous spectra: if your object ref

Note that due to how CRIs are calculated, you can have an arbitrarily bad color rendition even with any CRI <100 with discontinuous spectra: if your object reflects mostly on the bands where the spectrum is weak, it will appear black (or you could have a daylight e.g. red object appear e.g. blue or any other color). That's why incandescents are really the standard for color rendition.