The shatter-resistant Energy Miser CF42DTEIN841 42-watt triple tube CFL lamp has a GX24q-4 base, CRI of 82, and an average life of 10,000 hours. This compact fluorescent light bulb comes with a 15 month warranty and a shatter resistant P.E.T. coating. The PET coating around the tube has U.V. protection against yellowing, fading, and clouding. It is extremely strong, puncture resistant, and lightweight. These fluorescent lamps are perfect for any residential or commercial application. Can be used in plug-in sockets throughout your home.