XLEDIA X-Series X40L A19 LED Light Bulb, 40-Watt Replacement, Soft White (2700K) Most Efficient Directional LED Suitable for Fully Enclosed Fixtures 485 lumens Thermal Tunneling Resistance (TTR) Technology Extremely Light Weight - 30% to 50% lighter than most LED bulbs High Efficiency Power Circuitry - &gt; .99% power factor &gt;40,000 Hour Life Expectancy