What is R9 Color Rendering Value

The R9 color rendering value is a specific component of the Color Rendering Index (CRI). The CRI measures a light source’s ability to accurately reproduce the colors of objects compared to a reference light source. While the CRI takes into account the average values of R1 to R8, the R9 value specifically focuses on the light source’s ability to accurately render the color red. The R9 value is not included in the overall calculation of the CRI. This means that even if a light source has a high CRI, it may not necessarily have a high R9 value, indicating a potential deficiency in accurately rendering red colors.

什麼是 R9 顯色指數值

R9 顯色指數值是顯色指數 (CRI) 中的特定成分。顯色指數用於衡量光源相較於參考光源能否準確還原物體色彩的能力。雖然顯色指數考慮的是 R1 至 R8 的平均值，但 R9 值專門針對光源準確還原紅色的能力。R9 值並不包含在顯色指數的整體計算中。這意味著即使光源具有高顯色指數，其 R9 值亦未必高，表明其在準確還原紅色色彩方面可能存在不足。