LED AREA LIGHTING RETROFIT: YUMA BORDER PATROL

Along the Yuma Sector Border Patrol Area in Yuma, Arizona, the GATEWAY program conducted a trial evaluation in which the incumbent quartz metal halide area lighting was replaced with LED at three pole locations, and illuminance measurements were recorded initially and at 2,500 hours, 5,000 hours, 7,000, and 11,000 hours of operation. Additionally, four second-generation LED luminaires installed as part of the full installation were evaluated initially and again after 4,000 hours of operation. While the initial energy, lighting quality, and maintenance benefits relative to the incumbent high-pressure sodium system were very satisfactory, the study raises important questions regarding the long-term performance of LED lighting systems in high-temperature environments.

PHILADELPHIA INTERNATIONAL AIRPORT APRON LIGHTING

This report documents a trial installation of LED apron lighting that replaced the existing high-pressure sodium luminaires at Philadelphia International Airport. Such high-mast applications remain challenging for LED technology, and the lessons learned from this project may help facility managers and LED product manufacturers better meet those challenges.

EXTERIOR LED LIGHTING PROJECTS AT PRINCETON UNIVERSITY

This report focuses on four exterior solid-state lighting projects that have been completed at Princeton since 2008, when the university adopted a comprehensive sustainability plan. Through these initial projects – which include a parking garage, a pedestrian path, and two parking lot installations – the school’s facilities engineering staff learned important lessons about SSL technology and gained experience in dealing with the rapidly changing landscape of lighting manufacturers and their suppliers.

RESTORING DETROIT’S STREET LIGHTING SYSTEM

This report provides an objective review of the circumstances surrounding the city of Detroit’s comprehensive streetlight system restoration, the processes undertaken and decisions made, and the results — and contains useful information about issues that arise during large-scale LED street lighting projects. (September 2015)

PORTLAND’S PURCHASE AND CONVERSION OF AN LED STREET LIGHTING SYSTEM

During the ongoing process of converting its streetlights from high-pressure sodium to LED, the city of Portland, Oregon, purchased a large portion of its street lighting system and encountered a range of issues among the stakeholders. This report identifies some of the challenges involved and discusses how they were addressed, in order to help inform and facilitate future lighting transitions elsewhere. (August 2015)

LED ROADWAY LIGHTING: I-35W BRIDGE

On the I-35W Bridge in Minneapolis, Minnesota, the GATEWAY program conducted a two-phase demonstration of LED roadway lighting on the main span. The Phase I report, published in August 2009, provides an overview of initial project results including lighting performance, economic performance, and potential energy savings. The Phase II report documents the longer-term field performance.

PEDESTRIAN FRIENDLY OUTDOOR LIGHTING

The GATEWAY program followed two pedestrian-scale lighting projects that required multiple mockups – one at Stanford University in California and the other at Chautauqua Institution in upstate New York. The report provides insight into pedestrian lighting criteria, how they differ from street and area lighting criteria, and how solid-state lighting can be better applied in pedestrian applications. (December 2013)

LED STREET LIGHTING: KANSAS CITY, MISSOURI

At nine sites in Kansas City, the DOE Municipal Solid-State Street Lighting Consortium evaluated nine different LED street lighting products and compared them to the high-pressure sodium (HPS) luminaires they replaced. This study illustrates many of the challenges involved in matching products to real-world applications, even under carefully maintained conditions. (June 2013)

LED PARKING STRUCTURE LIGHTING: WASHINGTON, DC

At the parking structure of the U.S. Department of Labor headquarters in Washington, DC, LED luminaires were installed in place of the incumbent high-pressure sodium (HPS) luminaires and evaluated for relative light quantity and performance. (March 2013)