Philips 140987 High Intensity Discharge High Pressure Sodium 400-Watt ED18 Mogul Base Light Bulb

Philips 400-Watt HID High Pressure Sodium light bulbs offer premium light quality and energy efficiency Ideal for use in parking lots, dusk-to-dawn fixtures, roadway lighting, and industrial and commercial applications Medium Base ED18 Shape C400S51 for use on ANSI S51 ballast