For those engaged in the lighting industry, the color rendering index CRI is a common term. Everyone often sees the CRI value on the data of the light source, and knows that it reflects the color rendering quality of the light source, but its actual meaning is what? The CRI value helps people determine which light source should be used in a lighting device. The higher the CRI value, the better, but do people know what it actually measures and how to measure it? For example, a light source has a CRI value of 95. What information does this convey? â— Definition of CRI The International Commission on Illumination (CIE) defines color rendering as the effect of a light source on the color appearance of an object compared to a standard reference source. In other words, CRI is a measure of color recognition in comparison to a standard source such as daylight. CRI is a universally accepted metric and the only way to evaluate and report the color rendering of light sources. The establishment of the CRI metric is not far away. The purpose of the standard was to use it to describe the color rendering of fluorescent lamps that were widely used in the 1960s, and to help users understand that spectrally distributed fluorescent lamps can be applied. What occasions. Figure 1:14 standard color CRI color sample The CRI measurement is closely related to the difference between the appearance of the specified 14 color samples (hereinafter referred to as "color samples") under the measured light source and the appearance of the standard reference light source. Although the CRI is derived mathematically, and an actual color chart cannot be used to determine CRI values, the color of these color samples is true and they are all selected from Munsell color samples. Figure 1 shows 14 standard CRI color samples. The first 8 color samples are usually used to determine the general color rendering index (usually the CRI value mentioned is the general color rendering index). The selected TCS01-TCS08 has medium saturation. It has roughly the same brightness, and the color range covers the entire visible spectrum. The last 6 blocks are special color samples. TCS09-TCS14 is rarely used. In addition to imitating European skin color and leaf green, it also includes higher saturation primary colors. Arts And Crafts Zinc Casting,Cold Chamber Die Casting,Aluminium Gravity Die Casting,Gravity Die Casting Parts Dongguan Metalwork Technology Co., LTD. , https://www.dgdiecastpro.com