I know there are some color charts floating around pertaining to flux and binning, etc, but I often found myself in a tedious search when trying to determine exactly what LED was being referred to.
When I was searching for a neutral white flashlight, many of the codes I know now, I didn't know then. I'd see that this was the LED and didn't know what temperature or type it was.
So, here is some imformation on some popular LEDs in one place. If something like this is posted, I'm not stepping on your toes. I just wanted to consolidate some links, info and images and it works for me. It is not an exhaustive post, but I included some links where you can find more info if you don't see what you need. I hope some will find it useful - if you find a mistake, please let me know:
If the Cree LED that you are looking for is not here, you can find the whole Cree family here.
Other popular LED datasheets
For more Luxeon information, click THIS LINK for Rebel or THIS LINK for Star. Select the LED > 'Learn More' > 'Detailed Specifications' for datasheets.