A19 40W LED 3000K/5000K Light Bulb(US ONLY)

Features Bright and Efficient: Compared with other LED bulbs, SANSI's highly efficient light bulbs can provide 5500 lumens using only 40 watts of power, equivalent to 350W incandescent bulbs. Based on 3 hours per day usage, save up to 95 percent electricity, annual estimated cost 4.82 dollars. High Light Efficiency: Adopts self-encapsulated LED epistar, can provide high light efficiency 137 Lumens per Watt, meet your bright lighting needs in home, workspace, classroom and so on. Patented Ceramic Technology: SANSI's patented technology replaces the traditional Mcpcb aluminum substrate with a non-conductive ceramic heat sink, directly soldering the LED chip on the ceramic heat sink, effectively reducing the systematic thermal resistance between the LED PN junction and the surface of the heat sink, resulting in faster heat conduction and higher product reliability, making SANSI's bulbs perform with higher light efficiency. (Note: For better heat dissipation we don't suggest you to use th