The new compact fluorescent CFL helix spiral 200W equivalent long life energy savers from Pro-Lite consume just 55W of electricity and last 8 times longer than the traditional incandescent. Features a ES-E27 Edison screw (27mm) base/cap.Featuring flicker-free instant start electronic circuitry, they give off an ultra-bright daylight white light to cover the full spectrum of natural daylight, making them ideal for craft work, graphic design, artwork or anyone needing a bright, high quality light.The ProLite 55W Helix T3 high power compact fluorescent spiral light bulbs offer an outstanding light output of 3150 lumens, and is suitable in both domestic and commercial applications.Need more help in choosing a suitable light bulb? Read our guide Choosing Compact Fluorescent Lamps