DOE released LED street lamp and high pressure sodium lamp test report

These LED lights installed in February 2011, after two years of testing, reveals the LED lamp although not as high pressure sodium lamp lumen output or effect, but the LED lamp can output more lumens to pavement and reduce the overflow of light. Taking into account the technical level of these LED Street stay in 2011, you can think of the technology now allows LED street performance is more prominent. The project includes the installation of a range of lights from 63W to LED instead of 100W, 15, 291W. From the beginning of 2011, DOE municipal solid state street light Consortium (MSSLC) on Kansas City, Missouri, nine SSL street lamps conducted this experiment, the experiment revealed that the performance of LED slightly higher than sodium.

The U.S. Department of energy (DOE) released the news on its website. These LED lights installed in February 2011, after two years of testing, reveals the LED lamp although not as high pressure sodium lamp lumen output or effect, but the LED lamp can output more lumens to pavement and reduce the overflow of light.

Taking into account the technical level of these LED Street stay in 2011, you can think of the technology now allows LED street performance is more prominent. The project includes the installation range from 63W to 291W LED lamp instead of 100W, 150W, 250W, 400W sodium lamp, the measurement results can reduce 31-51% energy, with an average value of about 39%, but the LED lamp reduces the average of about 31% lumens.

LED street lamp compared to the average increase of high pressure sodium lamp efficiency of about 15%, but there are more than two LED product efficacy is lower than the high-pressure sodium lamp products. In addition, the application effect of LED street lamp is more accurate, and the lumen to the target area is increased. However, such as the LED lamp or has some significant advantages, LED, lighting a 130W high pressure sodium lamp to replace 150W, LED lamp efficiency of 83 LM / W, compared with the effect of high pressure sodium lamp 45.1 LM / W has obvious advantages, but there are scattered light. However, the 250W class LED lamp compared to high pressure sodium lamp without overflow, LED lamp efficacy of 47 lumens / watt, high pressure sodium lamp is 33.6 lumens / watt. In the category of 400W, outdoor area lighting high-pressure sodium lamp compared to LED products have a certain competitive advantage, but there are also some of the market to achieve alternative LED street lamp.

Summary of the above experimental results, DOE online report pointed out that LED lamp is slightly more effective than high-pressure sodium lamp. However, SSL replacement provides significant energy saving benefits, eliminates the need for more efficient and more uniform lighting, and saves maintenance costs.