Chanzon High Power Led Chip 300W Cool White (9000K-10000K/4500mA/DC 60V-68V/300 Watt) Super Bright Intensity SMD COB Light Emitter Components Diode 300 W Bulb Lamp Beads DIY Lighting 300Watt / Cold White / 9000 K-10000 K / 30000-35000LM / 45mil chips / 120-140 degree Emitting Angle Input(DC): 4500mA / 60V-68V (Best Match with "Chanzon 4500mA Constant Current LED Driver") Integrated Chanzon High Quality,High Brightness Chip on Board / Double Golden Wire / Copper Frame) 50000 Hours Life Span (Working Temperature should be less than 60? (140?) with a Heat Sink System) Total Shipping Weight: 5.57oz / 0.158kg (Pack of 1)