Philips Ceramalux Non-ALTO HID High Pressure Sodium Lamp, C50S68/M 12pk Designation, 50 W Wattage, 52 V, 1.18 A, E26 Lamp Base, ED17P Shape, 4000 Lumens, 24000 hr Average Life, Cool White, 90 CRI, 4000 K Color Temperature, Glass Coated Lamp, 2.125 in Dia x 5.438 in L Dimensions