XLEDIA X-Series X100N A19 LED Light Bulb, 100-Watt Replacement, Cool White (5000K) Most Efficient Omni-Directional LED Suitable for Fully Enclosed Fixtures 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