... High brightness, low price 2. Good heat dissipation 3 COB LED Light source 4,CE&RoHS&EMC Certificate Model No. ... 500Gross W(G)600CRI75%CertificationsCE,EMC,RoHSRelative knowledge(COB)Chip on Board, or COB, refers to the semiconductor assembly technology where ... individual IC. The elimination of conventional device packaging from COB assemblies simplifies the Over all process of designing and ...