Philips Circline Fluorescent 22-Watt T9 cool white light bulb is ideal for use in garages, basements and workshops. It provides a cool white light that is ideal for a work-like environment. Better for the environment. Same performance characteristics. All fluorescent lamps need a small amount of mercury to operate efficiently and Philips has been working hard to reduce the mercury levels. We have always believed that a product can be good for the environment and provide the same or superior performance. This belief led to one of the industry's most innovative technologies. In 1995, Philips transformed the market by launching a line of linear fluorescent lamps featuring ALTO Lamp Technology. Philips pioneered this technology to do what's best for the environment, not just to pass a test. This technology led to some of the lowest mercury lamps in the industry and became widely recognized as the leading low-mercury solution for lighting. To further help reduce the environmental impact, Philips only uses recycled mercury in the lamps. Philips also reuses as much glass and Packaging materials as possible. Philips has target reductions in Packaging and production processes.