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Specification:Quantity: 10 pieces / PackBrand: ChanzonPower: 1 Watt (Max)Emitting Color: Natural White (4000K-4500K)Recommended Current: 300mAForward Voltage: 3.0-3.4VLuminous Flux: 100-110LMEmitting 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 (300mA Aluminum Case Waterproof): ? Search B01MYBFR7U on AmazonConstant current LED drivers (300mA Plastic Case): ? Search B01N25KD0R on AmazonConstant current LED drivers (300mA No Case only PCB Board): ? Search B01MUDW3VF on AmazonLED Heat Sink Star Aluminum Base Plate: ? Search B06XKTRSP7 on Amazon