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Specification:Quantity: 10 pieces / PackBrand: ChanzonPower: 4 Watt (Max)Emitting Color: RGBW (Red Green Blue White)Recommended Current: 300mA / ColorForward Voltage: R:2.0-2.4V G:3.0-3.4V B:3.0-3.4V W:3.0-3.4VLuminous Flux: R:50-60LM / G:80-90LM / B:40-50LM / W:110-120LMEmitting 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:LED Heat Sink Star Aluminum Base Plate: ? Search B06XKSWKZ2 on Amazon