In this paper. N and B codoped 4H-SiC and 6H-SiC single crystals were prepared by physical vapour transport method and their photoluminescence properties were studied. The photoluminescence spectra. dopant concentrations. https://www.spidertattooz.com/Nora-NEFLINTW-R6MPW-6-E-Series-FLIN-Round-LED-Downlight-27K-30K-35K-40K-50K-Selectable-120V/