Part C566C-BFS-CS0W0451 from Cree is an LED that has gone obsolete.
Digikey part number C566D-BFE-CU0W0351-ND is an option to look at as a possible alternative.
To verify this part will work in your application or to view full specifications see the manufacturer datasheet for part C566D-BFE-CU0W0351-ND.
The TechForum Cross Reference category is for parts that Digi-Key does not sell or parts that have gone obsolete. Our Engineers and Techs have reviewed the specifications for these parts and made a recommendation for a replacement. Please review the suggested part to ensure it will work for your application.