'HID Lamp, Lamp Type Metal Halide, Bulb Shape ED37, Base Type Mogul Screw (E39), 400 Watts, Bulb Color Temp. 4000K, Lumens 44, 000, Max. Overall Length 11-5/16 In., Shatter-Resistant No, Bulb Designation MVR400/VBU/XHO/PA, Metal Halide, Color Rendering Index 65, Light Bulb Dia. 4-5/8 In., Bulb Finish Clear, Average Bulb Life 20, 000 hr., ANSI Code M135/M155, Meets 2012 Lighting Legislation Energy'