To save energy, a county in the United States changed street lights and road signs to LED.

According to foreign media reports, Washtenaw County, Michigan, USA plans to change the street lights and road signs of 30 intersections to energy-saving LED bulbs, and the project will be planned for 6 to 8 months.

Signal Engineer Jeff Young said the aim of the county is to reduce energy and cost as much as possible. At present, 400 watt metal halide bulbs are used at the intersections, and the service life is about 15000 hours. It needs to be replaced at least once a year.

"Retrofitting LED can use the same luminaire for 50000 hours and only consume 120 watts". "We can save energy consumption immediately."

It is reported that each LED is priced at $197, but it is expected to last for about 11 years, saving about 500 thousand dollars for the county.

He said converting road signs to LED would be "the biggest savings".

He said that one of the reasons for upgrading is capital. The cost of retrofit comes from the Michigan transport fund rather than directly from the citizens. The department needs to spend 1% of its national transportation funds on non motorized projects.

"This LED transformation project is in line with our requirements." (Editor: LED net James)

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