The color rendering index is a quantitative measure of how accurately an LED bulb renders colors in comparison to a natural light source. Keeping in mind that an incandescent bulb has a CRI of 100, an LED with a CRI of 80 is considered good. A CRI of 80 to 90 percent is the most common LED CRI rating found on the market today. However, CRI is not always an accurate indicator, as some LEDs with low CRIs in the 20-30 percentiles can produce clearer and more precise white light than one rating at 90%.
For more information on CRI, check out our article on Understanding Color Rendering Index.