It's worth mentioning that Cree are the company that make the actual LED, and they are used in a huge spectrum of low to high quality products. Cheap Chinese manufacturers often buy these LEDs, and put them behind really cheap electronics, then sell them with a generic name including "Cree" in the brand (or -fire, for flashlights). The lumen output can also be widely inaccurate.

So if you do end up buying more online, you should be wary.