Compare LED lights with high pressure sodium lamps report

　　Starting in 2011, DOE Municipal Solid-State Street Light Consortium (MSSLC) for the nine Kansas City, Missouri SSL lamps conducted this experiment revealed slightly outperformed the LED HPS. U.S. Department of Energy (DOE) announced on its website on the news. These LED street lights installed in February 2011, after more than two years of testing, reveals the LED street lights, although not as high pressure sodium lamp lumen output or efficacy, but the LED street lights can output more lumens to the road surface and reduce light spill. Taking into account the technical level of these LED street lights stay on in 2011, can be considered the current technology allows LED street performance is more prominent.

　　The project includes the installation ranges from 63W to 291W LED street lights instead of 100W, 150W, 250W, 400W sodium lamp, the measurement results can be reduced 31-51% of energy, an average of approximately 39%, but the LED street lights reduces the average of about 31% of the lumen . LED street lights compared to high pressure sodium lamp efficacy average increase of about 15%, but there are two LED product efficacy than high pressure sodium products is low. In addition, LED street lights application effect is more accurate, delivered to the target area of the lumen increases. However, LED street lights still has some significant advantages, for example, a 130W LED lamps replace 150W high pressure sodium lights, LED street lights efficacy of 83 lumens / watt, high pressure sodium lamp efficacy compared to 45.1 lm / W has obvious advantages, but has scattered light. But 250W class LED street lights compared to high pressure sodium light without overflow, LED lighting efficacy is 47 lm / W, high-pressure sodium lamp of 33.6 lumens / watt.