This Philips 24671-0 shatter-resistant T8 lamp with ALTO II technology has 50 percent less mercury than prior ALTO T8 lamps, making these lamps the most sustainable linear fluorescents available. Best of all, these lamps offer the same performance levels as ALTO lamps (life, energy, and light output). It also features 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.