HID High Pressure Sodium Lamp, Designation: LU50, 50 WTT, ET23 1/2 Shape, E39 Mogul Base, Clear, 24000 HR, Lumens: 24000 LM Initial, 2100 DEG K Color Temperature, 22 CRI, 7-3/4 IN Length, 2-15/16 IN Diameter, Burn Position: Universal