LED technology continues to rapidly mature and is pursued as a street lighting alternative to traditional lamp sources categorized as HID lamps such as high pressure sodium. In order to quantify the performance of new LED street lighting options, lighting specifiers must compare the claimed benefits of LED fixtures, including long life, reduced maintenance, and energy savings, to existing HID sources.
The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute recently released a new publication detailing field test evaluation results of an LED street lighting installation in a suburban business park in upstate New York. Through real-world environment case studies, LRC’s DELTA program provides objective information regarding the performance and acceptance of products.
In this recent case study, DELTA evaluated 16 Edge LED luminaires, manufactured and donated by BetaLED, lining a curved, three-lane street built to service a new office building in North Greenbush, New York. The mission was to examine and measure system performance, photometric performance, energy savings, light pollution and whether volunteers visiting the site accepted the LED street lighting system. The results are detailed in Field Test DELTA Snapshots: LED Street Lighting.
The Edge luminaires use a system of LED bars, each bar housing 20 high-output white LEDs. Based on the desired light output, lighting specifiers select the number of bars per luminaire. In this installation, the Edge luminaires have three LED light bars each and are mounted on poles 30 feet high and spaced 130 to 180 feet apart. DELTA compared the installation to a neighboring high pressure sodium street lighting system in the same business park.
General study findings:
· Most visitors considered the lighting to be, overall, the same as or better than other roadways at night.
· Relative to the neighboring HPS installation, the LED installation uses less power while providing better uniformity.
Get the details here (PDF).
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