XLEDIA LED Bulb-X100L (A19-100W Equivalent-1520 Lumen-Soft White-Enclosed Fixture Suitable) XLEDIA equipped special designs can be used in enclosed fixture and still keep its long lifetime and great performance. These are the first commercial available products in North America. XLEDIA LED light bulbs adopt TTR technology (Tunneling Thermal Resistance) to effectively dissipate heat from both LEDs and power drive. Estimated Yearly Energy Cost $1.87(Based on 3 hrs/day, 11/kWh,cost depends on rates and use) 3 years warranty, for more detail please check official website:www.xledia.com