General Description: The Philips 400 watt High Pressure Sodium lamp is ideal for parking lots, garages and other industrial applications. It produces 50,000 lumens of light while only using 400 watts of energy and has a average rated life of 24,000 hours. This HID lamp requires a S51 ANSI code ballast to operate. It has Philips ALTO technology which makes it non-hazardous material by the EPA TCLP specifications.
General Description: This Philips High Pressure Sodium 400 watt light bulb has a non-cycling technology to help reduce long-term maintenance cost because it will fail to off when it is at its end of life. It can be used were any traditional 400 watt high pressure sodium ED18 light is used. You will no longer have to wait for a light to cycle to confirm it needs replacement. This lamp has a 30,000 hour average rated life and provides 50,000 initial lumens. This high pressure sodium light bulb has Philips Alto technology making it environmentally friendly (only contains 5.4 mg of mercury).