noun
general color rendering index; Ra
Technical term in lighting and color science; measures how accurately a light source renders colors compared to a reference illuminant. Often abbreviated as Ra.
このLED電球の平均演色評価数は90以上です。
This LED bulb has a general color rendering index of 90 or higher.
演色性 is the broader concept of color rendering properties, while 平均演色評価数 is the specific numerical index (Ra) used to quantify it.
Compound of 平均 (average), 演色 (color rendering), 評価 (evaluation), and 数 (number), directly translating the English term 'general color rendering index'.