This PLT F8T5 linear fluorescent tube has a color temperature of 4200K, medium bi-pin base, and an average life of 7,000 hours. It is protected by 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.