Lower CRI values indicate that some colors may appear unnatural when illuminated by the lamp. Fluorescent lamps, on the other hand, only have a CRI of 60 to 90. The CRI of different light sources is measured using a scale, ranging from 0 to 100. CRI or Color Rendering Index is a scale from 0 – 100 that measures a lights ability to render colors accurately compared to a natural light source. OK, but what does that mean? When an LED light has a CRI of over 90, it's classified as a high CRI LED. https://www.lumens.com/light-bulb-facts/color-rendering-index.html Cool white fluorescent lamps have a CRI of 62, however fluorescent lamps containing rare-earth phosphors are available with CRI values of 80 and above. Natural light (sunlight) has a CRI of 100. If one has a CRI of 80, which most LED bulbs currently do, and you see another one has a CRI of 89, then you know that using the latter will show more saturated colors than the former. The effect of a light source on colour appearance is measured in the colour rendering index (CRI), on a scale of 0-100. Incandescent and halogen lamps also have the maximum color rendering index of 100. Natural outdoor light has a CRI of 100 and is used as the standard of comparison for any other light source. LED PAR38 - 100W Equal - High CRI. An incandescent bulb has a CRI of 100. A CRI of 100 represents the maximum value. The higher the CRI, the better the color will be represented. High-CRI LED lighting is a light-emitting diode (LED) lighting source that offers a high color rendering index (CRI). LED A21 - 17 Watt - 100 Watt Equal - Halogen Match - 2 Pack Color Corrected - CRI 90 - 1600 Lumens - 3000 Kelvin - Medium Base - 120 Volt - Euri Lighting EA21-4000cec-2 Life Hours: 25,000 https://www.cnet.com/news/shining-a-light-on-high-cri-led-bulbs Incandescent lamps have a CRI above 95. High CRI and R9 values: CRI (Color Rendering Index) measures color accuracy relative to incandescent bulbs, or natural daylight. The CRI value, on a scale of 0 to 100, is used to compare one LED light to another. The CRI of Philips LED lighting products is always higher than 80, close to natural light. Many of the incandescent and halogen "replacement" LED lights currently on the market use less energy but are not true replacements as the white light they emit is of relatively poor quality. CRI is a quantitative measure of a light's ability to reproduce the colors of objects faithfully in comparison with an ideal or natural light source. It means that a low CRI light bulb makes funky light that will distort colors! For display or accent lighting where color is important, choose these LED PAR38 flood light bulbs with a high color rendering index … High CRI LED Lighting High quality, energy efficient, high CRI Not all white light is the same. 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