... High brightness, low price 2. Good heat dissipation 3 COB LED Light source 4,CE&RoHS&EMC Certificate Model No. lux- ... 500Gross W(G)600CRI75%CertificationsCE,EMC,RoHSRelative knowledge(COB)Chip on Board, or COB, refers to the semiconductor assembly technology where in ... a result of the shorter interconnection paths. Merits 1,Epistar chip --- stable quality & competitive price 2,Aluminium shell --- best ...