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Chip On Board, or COB, grow lights are the newest technology in LED grow lights for Cannabis growers are always on the lookout for the best and brightest when it comes to grow lights, andWhat's the difference between a traditional LED flashlight and a COB (chip on board) flashlight?COB ( chip on board ) LED products are slowly starting to seep into the market , it is set to take the whole industry by storm soon A chip on board LED is basically a LED chip diode built directly on the the circuit board The chips are bonded directly into the PCB at the manufacturer Cob Series Version6 Lighting Led Citizen Electronics Co Ltd Cob led work light