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Specification:Quantity: 1 piece / PackBrand: ChanzonPower: 20 Watt (Max)Emitting Color: Royal Blue (440nm-450nm)Recommended Current: 600mAForward Voltage: 30-34VLuminous Flux: 350-400LMEmitting Angle: 120-140 degreeWith Double Golden Wire (99.99%) and Copper FrameKindly Reminder:Constant current LED drivers are recommended for high power COB LEDs.Working temperature should be less than 60 Degrees Celsius / (140 Fahrenheit) with a Heat Sink System.Please refer to the positive (anode +) and negative (cathode -) sign on Leds.Related Accessories:Constant current LED drivers (600mA Plastic Case): ? Search B01N374QMQ on AmazonConstant current LED drivers (600mA Aluminum Case Waterproof): ? Search B01MSANK1C on AmazonConstant current LED drivers (600mA No Case only PCB Board): ? Search B01N6U68LI on AmazonLED Lens Kit 20-100W 44mm (60 degree): ? Search B06XKV9PWY on Amazon