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The City of Denver has one of the largest light-emitting diode traffic light inventories in the country.
In the late 1990s, the city's Traffic Operations Division began an ongoing retrofit program to convert its traffic signals from incandescent lamps to LED bulbs. Since then, more than 48,000 red, yellow and green traffic and pedestrian signals have been converted to LED, which saves the city more than $800,000 per year in energy, labor and material costs.
Denver has approximately 1,250 traffic intersections containing over 55,000 signal indicators, and they must be powered 24 hours a day.
A single four-way conventional traffic light with incandescent lamps consumes roughly 85 kilowatts of electricity per day and costs about $1,600 per year to operate. For a city the size of Denver, traffic lights would consume 931 million kilowatts of electricity per year at an annual cost of $2 million. Learn More
In the late 1990s, the city's Traffic Operations Division began an ongoing retrofit program to convert its traffic signals from incandescent lamps to LED bulbs. Since then, more than 48,000 red, yellow and green traffic and pedestrian signals have been converted to LED, which saves the city more than $800,000 per year in energy, labor and material costs.
Denver has approximately 1,250 traffic intersections containing over 55,000 signal indicators, and they must be powered 24 hours a day.
A single four-way conventional traffic light with incandescent lamps consumes roughly 85 kilowatts of electricity per day and costs about $1,600 per year to operate. For a city the size of Denver, traffic lights would consume 931 million kilowatts of electricity per year at an annual cost of $2 million. Learn More