Views: 68 Author: Site Editor Publish Time: 2020-09-23 Origin: Site
What does LED selfie ring light color rendering index (CRI) mean?
The color rendering index (CRI) is used to measure the ability of a light source to accurately reproduce a set of 8 standard color patches. It is calculated by a standardized test developed by lighting manufacturers in the mid-20th century. You must not understand that. Then explain to you that the light shining on the same dish has different attributes, which is called the color rendering index. Is the higher the color rendering index the better? The color rendering index of sunlight is defined as 100. In order to comply with the long-term lighting habits of human beings, the International Commission on Illumination stipulates that the Planck radiator should be used as the reference light source for low color temperature light sources below 5000K, and the standard illuminator D should be used as the reference light source for the color temperature above 5000K. The color rendering index of the reference light source is set as 100. Still can't understand? It doesn't matter, after reading this article, you will understand what color rendering index is.
What does CRI rates mean for photography?
The Color Rendering Index (CRI) is used to measure the ability of a light source to accurately reproduce a set of 8 standard color patches. Compared with sunlight, sunlight is considered ideal or CRI 100. These original reference color blocks are R1 to R8, as shown in the figure below.
You will notice that R1-R8 are all soft colors, which is very useful for measuring the subtle differences in the output of various incandescent lamps. The light emitted by incandescent lamps is similar to the light emitted by our sun or even candles; that is, by heating the material until it emits visible light. Most incandescent light sources emit a spectrum that is very close to the ideal (sun, CRI 100), so there is no need to measure color, and these lights can be accurately presented without problems.
Since the Selfie ring light LED CRI value of daylight is 100, the light we pursue is closer to the nearer light, the light received by human eyes will be more comfortable and realistic.
Light source control standard and effect of color rendering index
The color rendering index is a measure of the color rendering of a light source, expressed by the degree of consistency between the color of the object under the measured light source and the color of the object under the reference standard light source. The general color rendering index is the average value of the color rendering index of the light source to the first to eight standard color samples specified by the International Commission on Illumination. It is commonly known as the color rendering index and the symbol is Ra. The "color rendering index" we usually call is the abbreviation of general color rendering index. The special color rendering index is the color rendering index of the light source for the 9th to 15th standard color samples selected by the International Commission of Illumination. The symbol is Ri.
The figure above is the appearance of the 14 test colors used in the color rendering index system.
General color rendering index：
The larger the Ra, the better the color rendering performance; on the contrary, the worse the color rendering performance.
Commonly used lamps and color rendering index are as follows:
The spectral power distribution of the light source determines the color rendering of the light source. The closer to the natural light spectrum, the higher the color rendering index.
You can say that "color rendering index" does not represent all of a lamp. However, it cannot be without "high CRI". Because the high CRI has its unique advantages:
Is the higher the color rendering index the better? Examples discuss high color reproduction when used for Selfie!
Is the higher the color rendering index the better for selfie face? This is a picture of a beautiful woman's face. As the saying goes, "There is no harm without comparison." A good CRI ring light shines on a beautiful woman's face, it should have its own beauty effect. The whole frame is divided into three parts, the upper part is the effect of being illuminated by the light of color rendering index 65, the middle part is the effect of being illuminated by the light of color rendering index 73, and the lower part is the effect of being illuminated by the light of color rendering index 80.
It can be seen from the picture that the upper part of the color is obviously distorted, the color details are lost, the color saturation is very low, and the light's restoration of the color is very low, giving people the feeling of "black in the hall". The effect of the middle part is obviously better than that of the upper part, with a certain color, but the effect is not good, the result is sallow skin, no vitality. The effect presented in the lower part is highly reductive and more pleasing to the eye. The color saturation is high, the skin on the face is ruddy and shiny, and the lips are sexy and ruddy, which is very attractive.
What is the relationship between Selfie ring light color CRI rendering index and eyes?
The optics community has repeatedly confirmed that natural light can prevent myopia. From the perspective of protecting eyesight, it is the right choice to choose high-CRI lamps, especially table lamps for children. Children's books, toys and other things are colorful. If you choose a table lamp with a low CRI, the colors reflected back to the children's eyes will lose saturation, causing color distortion, and easily cause visual fatigue, which may lead to myopia.
The above is the knowledge answer about what the color rendering index means and the higher the color rendering index, the better. Different places have different requirements for the color rendering index. For example, museums require precise color contrast and high color requirements. The color index must be above 90. The color rendering index is between 80 and 89 for places that need correct color judgment. For places that require medium color rendering, the color rendering index is between 60 and 79.