Yeah that will be top bin for that color and chip. The data sheets break down the rest of the product code but that's the important part. Beside it to the right, the 30 indicates 3000k probably also useful to know lol.
http://www.cree.com/~/media/Files/C...Modules/XLamp/Data-and-Binning/ds-CXB2530.pdf

http://www.cree.com/~/media/Files/C...Modules/XLamp/Data-and-Binning/ds-CXB2530.pdf

