Environmentally Responsible Lamps Sustainable lighting solution - Reduces the impact on the environmentlow mercury and energy efficient.;24 month warranty period. Philips leads the industry with the lowest level mercury technology. Reducing the mercury level (source reduction) during the manufacturing phase is essential to creating products that are less harmful to the environment. Available in 17, 25, and 32 watts 5000 color temperature and 32 watts, 3000 color temperature. Ideal for use in 2x2 fixtures in offices, corridors, hallways and schools.