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The massive piers that comprise the U.S. Naval Station in Everett, WA—think 1,620 ft long and 120 ft wide, each— have an equally large job to do. The structures host aircraft carriers such as the USS Nimitz during loading, unloading and servicing, 24 hours per day, seven days per week. The port’s previous lighting system, which utilized 1,000- W HPS lamps with magnetic ballasts, was falling below the Navy’s illumination standard for an average of 3 fc on the pier and .3 fc in pedestrian areas. To reduce energy and maintenance costs, provide better quality of light and comply with International Dark-Sky Association standards, the station’s energy manager tested three LED luminaires before deciding on Bright Light Systems’ light emitting plasma (LEP) luminaires for the port’s retrofit. The 540-W fixtures provide even and compliant illumination, reduce energy costs by 50 percent and are expected to last for 50,000 hours. “The Navy calculated that LED luminaires could not be used as a one-for-one replacement and achieve equivalent light level specifications, so structural changes would have been required to accommodate additional LED luminaires,” explains John Chalmers of Bright Light Systems. “Instead, the LEP luminaires deliver higher lumen density and a full color spectrum compared to LEDs.”

- Samantha Schwirck

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