... low price 2. Good heat dissipation 3 COB LED Light source 4,CE&RoHS&EMC Certificate Model ... 600CRI75%CertificationsCE,EMC,RoHSRelative knowledge(COB)Chip on Board, or COB, refers to the semiconductor ... The elimination of conventional device packaging from COB assemblies simplifies the Over all process of ... attenuation 3,Widely & generally used 4,High power ------ warranty of 2 years 5,Longer lifetime: ...