These 2 down lights are same Color Temperature, but definitely different colors of light. What's wrong?
A. The test instrument (for Color Temperature) is wrong
B. It is caused by different Ra
C. It is caused by different SDCM
D. It is caused by different X & Y value
E. It is caused by different Lumen efficiency
F. Hard to say, hard to solve
G. It is caused by Camera
The 1st batch of downlight is A, the 2nd batch is like B color. Now customer require to reject all the 2nd batch. But in the contract there is only requirement for the CCT. How to solve this problem?