Sunlite 03679-SU MV400/DX/MOG H33 Mercury Vapor Lamp, 400 Watts, Mogul Base (E39), ED37, 12000 Hours Life, 22000 Lumen, Coated White FinishColor:400 Watts | Size:Mogul Base Product Description Sunlite high intensity discharge lamps are perfect for outdoor lighting and commercial interiors. Energy efficient HID lamps offer exceptional efficacy, great color rendition, have a long service life and excellent lumen maintenance. These 400 watt Mercury Vapor bulbs have a bright 22000 lumen output. They are mogul base (E39), ED37 bulbs with an average life span of 12000 hours. Use in street lights, parking lot fixtures, perimeter lighting, wall packs, and other commercial and industrial lighting applications. ANSI Code H33. Confirm ANSI Code to help determine the correct bulb for your fixture and the ballast it uses. Bulb measurements are 4.741 inches in diameter, 11.036 inches tall. From the Manufacturer Sunlite high intensity discharge medium and mogul base lamps have an extended life and are perfect for outdoor lighting and commercial interiors. These energy efficient HID lamps offer great color rendition, have a long service life and excellent lumen maintenance. This Sunlite 400-watt HID mercury Vapor mogul base ED37 H33 bulb offers 20500 lumens of light output and has an average rated life of 10000 hours.