The LED lamp unit is included in the colored lamp post in Regensburg, Germany.
Researchers in the UK are currently actively working with companies to develop the best solutions for applying light-emitting diode (LED) technology to road lighting to develop more durable, low-energy road lighting.
According to British media reports, the University of Manchester in the north of England is now working with LED lighting company Dialight Lumidrives. Researchers from the University's School of Electrical and Electronic Engineering are working on how to make a group of LEDs that are tightly compressed together work safely and reliably. Scientists say that if LEDs are used to provide illumination, energy consumption can be reduced by 25% to 50%. But when 12,000 lumens (a typical 60 watt home illumination is 800 lumens) or more is required, heat and other electrical related issues will be an obstacle to LED technology. Engineers will also face some practical problems, such as the heat generated by a group of LEDs that are tightly packed together. Since LED modules can be used outdoors, it is necessary to consider actual environmental factors, such as the possibility of nesting birds on critical heat sinks.
Dr. Roger Shuttleworth of the University of Manchester's Power Conversion Department said: "LED technology for the first time shows its excellence in the display of appliances in the 1970s, and then we are increasingly seeing LEDs used in traffic lights and "Automotive lights," he said. "In the 20th century, old-fashioned sodium lamps that made all objects look orange were gradually replaced by high-pressure sodium lamps. These high-pressure sodium lamps are brighter and more visually pleasing, and can help. Resolving street crime and anti-social behavior while low energy consumption.†He added, “As environmental issues are mentioned at the top of the national and government agendas, energy conservation has become an important issue. If you know that there are only How many street lights, you will know how much opportunity there is in energy and cost savings."
Although high-pressure sodium vapor street lamps, which are very common in Europe, can generate 85 lumens of illumination per watt of electricity, experts believe that LED technology has produced more than 150 lumens per watt of electricity, and with the advent of new semiconductors, It is expected that this number will increase. Researchers say that while reducing energy consumption and overall operating costs, LED street lights can also help reduce light pollution, and the era of large cities emitting heat to the sky may be a thing of the past.
The long life of LED street lights means that there is no need to change them frequently, which reduces the potential for traffic disruptions and reduces the maintenance costs paid for this. The streetlight LED module that the University of Manchester is studying has a lifespan of more than 10 years, more than four times the life of ordinary street lamps. Under normal operation, the LED must undergo a process in which the light output is gradually reduced, and this process continues. The reason for the decrease in light output may be due to a decrease in the efficiency of light generated by the LED or due to a decrease in the optical path within the LED compression package. However, as long as there is no overload, LED street lights can reach 70% of the original light output capacity after 50,000 hours or 10 years of operation. However, this is not as important as it sounds. Relatively speaking, the human eye is not sensitive to changes in light output, and only when the reduction is 50% will it be noticeable.
It is reported that the one-year plan has been funded by the British government for £175,000, and Dialigh has provided the same amount of funds. One of the main goals of the program was to develop a very reliable and inexpensive road lighting solution.
Related background: LED
LEDs first appeared in digital watches and computers in the 1970s. Today, this technology has made great strides to make durable, low-energy, community-friendly road lighting. LEDs have a long life expectancy (up to 100,000 hours), and gradually increase the brightness output according to the model size and energy consumption rate. For general lighting and indicator lights, LEDs can be used to replace traditional sodium vapor units. Moreover, since the LED volume is so small, it is suitable to make a sleek, lighter and lighter illuminator. Most importantly, however, LEDs are environmentally friendly and safe. It does not contain glass, filament or mercury, so there is no explosion of the lamp due to halogen or high-intensity current. At the same time, LEDs are low cost and are not subject to mercury processing limitations due to sodium vapor units. Low-voltage direct current operation can completely guarantee the safety of consumers. The color LED modules make the colors very realistic and more energy efficient than incandescent units.
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