Chanzon 10 pcs High Power Led Chip 1W White (6000K-6500K/300mA-350mA/DC 3V-3.4V/1 Watt) Super Bright Intensity SMD COB Light Emitter Components Diode 1 W Bulb Lamp Beads DIY Lighting 1Watt / White / 6000 K-6500 K / 100LM-110LM / 30mil chips / 120-140 degree Emitting Angle Input(DC): 300mA-350mA / 3V-3.4V (Best Match with "Chanzon 300mA 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: 0.46oz / 0.013kg (Pack of 10)