Corey's chip is a global patent product, and no one dares to copy it completely. Observing the structure and circuit design of the chip under the microscope can prove whether it is CREE's chip or not.
CREE chip identification website:/products/led _ docs.asp.
(2) Supplier analysis
The chip is CREE's, not necessarily a product packaged by CREE.
If it is a regular agent or original factory, the quality should be no problem ~