In 2006, Portland converted 45,000 streetlights to LEDs. 20 years later, its streetlights and signals use 66% less energy and save the city $1.5 million every year

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https://economictimes.indiatimes.com/news/international/us/science-news-in-2006-portland-converted-45000-streetlights-to-leds-20-years-later-its-streetlights-and-signals-use-66-less-energy-and-save-the-city-1-5-million-every-year/articleshow/133663139.cms

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In 2006, Portland converted 45,000 streetlights to LEDs. 20 years later, its streetlights and signals use 66% less energy and save the city $1.5 million every year - The Economic Times

Two decades after 2006, Portlands lighting story offers a useful lesson for cities considering their own energy transitions. The important achievement is not that 45,000 lights were converted in 2006.

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In 2006, Portland converted 45,000 streetlights to LEDs. 20 years later, its streetlights and signals use 66% less energy and save the city $1.5 million every year - The Economic Times