Advanced luminaires yield 5 - to 7- year payback based on maintenance and energy savings. The WVDOT added the HMAO LED units to the approve product list (APL) after conducting a year-long pilot with several systems installed at interchanges near Milton and Charleston. According to Brandi Krofcheck, ITS/Asset Management Engineer, Traffic Engineering Division, WVDOT, the LED system will reduce maintenance by more than 50 percent. The HMAO luminaires use a modular chip design to provide up to 100,000 hours of operating life with virtually no maintenance while significantly reducing energy consumption. Krofcheck estimates the LED luminaires will reduce energy consumption by more than 25 percent compared to the HPS system. The system upgrade cost approximately $2 million and has a projected payback of five to seven years.
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