COB LED is better lighting effect, it is no dizzy, no uncomfortable glare, no zebra strips. When it light up, it looks smooth and like a lighting panel. Heat dissipation is good and easily manageable.Description:Voltage: 9-10V Current：350mA Power：3W Lumin：300lm Emitting Color: Warm White Color Temperature: 3000-3500K Total Size(LxW): 15*12mm Luminous surface Diameter：Φ10mm Great for making light sources for spotlight, led bulb, ceiling lamp,street lamp,landscape lamp,track lighting, tunnel light and so on. Advantage of COB: Less thermal resistance; Larger cooling for LED chips; Better light effectPackage Includes:2 x COB LED