This is the light Bulb which lasts up to 40,000 hours and twice as efficient compared to a regular incandescent bulb. E-lamp consumes 35 watts but gives a light output equal to a 75 watt regular house-hold bulb. The compact fluorescent Lamp(CFL) is more efficient than E-lamp. But E-lamp costs much less than CFL. Also the color rendition of E-Lamp is almost equal to day light and it does not contain the hazardous materials like Mercury and Phosphorous. The color rendition of CFL is less than desirable and contains the hazardous materials.