Philips Ceramalux 150-Watt High Pressure Sodium HID light bulb is an efficient lighting solution for industrial applications such as warehouses, post top lights and parking lots. It has a long life of up to at least 24,000 hours and is available in a wide range of bases and wattages. Philips Ceramalux HID bulb is ideal for use in security lighting, roadway lighting and warehouses.