The Feit Electric 175-watt E39 Base 6000K Mercury Vapor HID lamp light is an ED28-shaped bulb for industrial and retail high or low bays, streetlights, and parking lots. It produces a light output of 7,900 lumens using 175 watts of electricity. Use these bulbs only with ANSI ballast H39. Feit Electric H39KB-175/HDRP bulbs have a lifetime rating up to 24,000 hours, with an estimated annual energy cost of $21.08. Choose a dependable Feit Electric light bulb for your residential and commercial needs. For a safe, long-lasting HID replacement option, choose Feit Electric C7000/5K/LED/HDRP Corn Cob LED bulbs. Energy-efficient LED technology puts out high lumens while saving energy. They are shatter-resistant and 100% mercury-free. The lifetime of the LED bulb is rated up to 35,000 hours. Replace mercury vapor with LED bulbs and start saving money on electric bills and maintenance today.