Converting sodium lights to LEDs

Since adopting a greenhouse gas emission reduction policy in 2010, the city of 14,000 residents was also committed to making environmentally responsible infrastructure improvements.

West Richland’s 14,000 residents typically have more than 300 days of sunshine a year to enjoy the wide open spaces and breathtaking views of southeastern Washington. They also treasure their clear night skies. To minimize light pollution, the city installed full cutoff LED streetlights that prevent uplight and limit light intensity.

To fully realize savings, the city also invested in Acuity’s ROAM wireless network to control and monitor the lights. Nodes, or sensors, on each LED light communicate with each other in a wireless mesh network, meaning multiple sensors transmit data so a failure of one link won’t compromise the entire system. The built-in redundancy improves reliability, especially in harsh weather.

West Richland, Wash., recently converted all of its 1,097 high-pressure sodium lights to high-performance LEDs operating on a wireless control system, becoming the nation’s first city to pay only for the energy its streetlights consume.

The West Richland public works department uses Acuity’s ROAM Concierge software to monitor and control the city’s LED streetlights. The package includes full diagnostics for each light, including energy savings, work order management, and can be expanded to add more lights in the future.

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