The LEDs have been two different ones and the white light they emmit had a different "color" for each of the two versions. As I wanted to use them in the same application this cannot be done. I have to screen them and use one type in one board and the other type in the other board. But for the 3rd board I would need to mix the two versions which looks horrible. Therefore I can only use 2/3 of the order.
Thanks