Sunlite 03679-su mv400/dx/mog 400 watt mercury vapor light bulb, mogul base sunlite high intensity discharge lamps are perfect for outdoor lighting and commercial interiors. These energy efficient hid lamps offer exceptional efficacy, great color rendition, have a long service life and excellent lumen maintenance. This sunlite 400 watt mercury vapor mogul based ed37 bulb offers a light output of 22000 lumens and has an average rated life of 12,000 hours. Make sure to choose the correct lamp type for your fixtures, check the ansi codes to help determine the best match for the type of fixture and the ballast it uses. Also check if your fixture requires lamps that are pulse start and/or protected. features: package quantity: 6 average life hours: 12000 wattage: 400 shape: ed37 lumans: 22000