i have strong feelings it is not genuine cree leds. i got two of them, but they certainly have different color hue. one is a little bit greenish, second is a little purple color shifted. in my 2 led bicycle lamp it makes my eyes go crazy. i don't recommend these leds. i thought they may be real cree for the price, but now i think its fake.
well, leds are really have different shining color. one much mire magenta, another is much more green. i don't have an equipment to get any kind of metrics, but it is definitely can be seen with naked eye. i am pretty sure they are not genuine cree leds at all.
Works as advertised.