uxcell 10W LED Chip Cool White Bulb High Power Energy Saving SMD Lamp Light Bead DIY DC 9-11V Drive Voltage:9-11V;Chip Power:10W;Cool White.Color Tempreture:6000-6300K Forward Current(IF):900-1050mA ;Lumen:700-850lm;Size:29 x 20mm/1.1 x 0.8 Inch(L*W) Long service life,Low consumption,high brightness,Comfortable light source,harmless for skin and eyes Very low heat generating,saving energy,environmentally friendly To apply thermal paste on the back of the led chips is necessary ensure the leds' performance in heating.The Chip needs Cooling fin.