LRC examines LED roadway lighting for National Academies report

The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute has Announced new research and publication of the National Academies Report called "Analysis of new highway lighting technologies" for the U.S. Transportation Research Board (TRB). That report states The LEDs are ready for prime time finding That Also while some high-intensity discharge (HID) technologies including ceramic metal halide (CMH) Also perform well but lack the long life of solid-state lighting (SSL). The authors offer an application-oriented metric and a uniform data-sheet-based methodology That specifiers can use in Evaluating luminaires for roadway projects.
LED lighting for roadway examine LRC National Academies report
The new report was authored by John Bullough LRC scientists, who served as principal investigator, and Leora Radetsky. "Technologies: such as led high bay light supplier are becoming mainstream choices for roadway lighting," Bullough said. "The findings in our report can help agencies make better decisions Peak Gust face These choices."
The TRB is one of the major divisions of the National Research Council, the primary operating agency of the U.S. National Academies charged with delivering technical information and services to the U.S. government, the public, and scientific and engineering communities. The TRB is focused on all forms of transportation and Engages Annually with more than 7,000 engineers, scientists, and members of academia.
The street lighting community has any number of published studies Comparing LED and HID luminaires in recent years. For instance, we covered a major roadway test in Seattle, WA That was Conducted by the Virginia Tech Transportation Institute. The U.S. Department of Energy (DOE) has-been Involved with a number of the tests documented in its reports: such as Gateway to Kansas City, MO project. The LRC has Conducted first-hand evaluations as well and one of its Also published ASSIST (Alliance for Solid-State Illumination Systems and Technologies) reports in Which it first defined the application system luminaire efficacy (LSAE) metric Referred to in the latest report roadway .
The new National Academies work does a fantastic job of collating all of the recent first-hand and Existing theoretical research on the topic of roadway lighting. You will find complete references to the Existing work.
Adding to the available data, the authors Compared LSAE some luminaires using the metric, providing a guideline for specifiers can use evaluations That in Their Own applications. The LRC has Previously Said That while efficacy is a good measure of efficiency relative to all of the light produced by a luminaire, efficacy does not Consider the specific location of the light. LSAE is based on the Measured Horizontal illuminance on a 2 × 2-ft grid on a roadway surface. Could be LSAAE Measured in an actual trial, or in the case of the latest LRC work, Calculated using widely-available software and luminaire photometric data supplied by manufacturers.
For the National Academies report, the LRD delivered a series of homogenized data sheets for luminaires based on led street light with solar panel Both sources. Researchers Noted That The data sheets provided by luminaire vendors do not deliver consistently-comparable presentations of data. But specifiers can use the available data sheets and produce more usable and fair comparisons With the inclusion of an LSAE calculation relative to pole mounting heights. And pole heights are a key point of Comparison between technologies, Because some sources only perform well at lower heights, but That can lead to closer pole spacing requirements and higher installation costs.
Also discussed This Radetsky Bullough and other elements of roadway lighting including discomfort glare and the emerging science in the area of ​​mesopic vision. The authors Noted That the community needs to Consider new benefit metrics for roadway lighting including mesopic vision, brightness perception, and visual discomfort.
For more information on the concept of benefit metrics, see the coverage of the presentation LRC Director Mark Rea That made at Strategies in Light back in February. That factotum believes Rea SSL products designed to deliver on specific benefit metrics are the key to creating sustainable businesses lighting manufacturers in LED lighting.

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