Article 5.6 of GB/T24908 stipulates that "the initial value of the general color rendering index Ra of the lamp should not be 3 values lower than the specified value". The specified value is 80, which means that the measured value should not be less than 77 to meet the standard, without specifying a positive deviation Article 4 of the Energy Star standard requires a minimum color rendering index Ra of 80 for all lamps (whether non-standard or alternative). The assessment method is that the average Ra value is not less than 80, and the minimum single Ra value is not less than 77. And the special color rendering index R9 of saturated red is required to be greater than 0 The fourth clause of the IEC draft does not specify what the color rendering index should be. But it is required to indicate the color rendering index on the lamp and packaging
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