This 25 watt F25T12 linear fluorescent tube has a CRI of 60, color temperature of 4100K, and an average life of 7,500 hours. It is protected with 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.