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According to reports, Portland, Oregon, USA has begun to install light-emitting diode (LED) lamps to replace more than 55,000 high-pressure sodium street lamps. Michael, head of sustainable development in Portland? Michael Armstrong said the project, which is expected to last two years and cost $18.5 million, is Portland's largest energy-saving project to date. LED lighting is expected to save the city $1.5 million in energy and maintenance costs each year. At present, street lamps consume about one-fifth of the city's electricity costs. The LED lamp will reduce the energy usage per lamp by about 60, which means that the total electricity consumption of the city can be reduced by 12, that is, about 20 million kilowatt hours per year. In addition, LED lights come with a 10-year warranty. After 10 years, the savings saved by reducing power usage and reducing maintenance should be able to effectively cover the cost of luminaire conversion installation. At the same time, LEDs can open up programmable opportunities. Scott Stewart, Executive Chairman of the Dark Sky Association Scott Kardel said that one day, technicians can instantly adjust the brightness of the lights to save energy when there is no vehicle, or turn off or turn on the street lights to lead the police to cope with emergencies. Another change in changing LED street lights will be a significant reduction in light pollution. The LED is basically similar to the directional illumination of the spotlight, rather than emitting a diffuse pink or orange light like a high-pressure sodium lamp. Each 29-watt LED lamp that replaces a 100-watt sodium lamp consists of 12 small lights that can be set to point to a sidewalk or roadway. The LED installation was funded through bond measures approved by the City Council in 2012.
December 14, 2023