XLEDIA LED Light Bulb X150N (A21 150W Equivalent 2400 Lumen Cool White Enclosed Fixture Suitable) XLEDIA bulbs can be used in enclosed fixtures and still retain its long life and 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 $2.49(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