Philips Energy Advantage CDM AllStart E-rated lamps are a high-efficiency lighting solution that provides energy savings without compromising light quality. This 145-watt ED17 metal halide bulb is designed to replace a standard 175-watt lamp, reducing maintenance and recycling costs. Life rating 20,000 hours. This convenient lamp can be used with either probe or pulse start magnetic ballasts (ANSI C192/O) and has a universal operating position. The Philips 411066 is ideal for enclosed fixtures in low-ceiling industrial and retail centers as well as outdoor applications.