LED rendering index level(LED Ra)

Question one :what is rendering index for led chip? when led light fall on certain thing it represents the ability of rendering , we ‘ll call it ”rendering index” rendering index is import condition for evaluation of led quality . also is import method for evaluation of led source color rendering . which is widely applied right now . the higher the rendering index, the better the rendering . we can used the evaluation criteria to description the rending level:
Ra value < 50 as “bad”
Ra value >50 and <70 as “general”
Ra value >70 and <80 as “good”
Ra value >80 as “excellent”

At present , the led source of www.ledlightmake.com’ led can up to Ra≥97, can accept this personalized customization