DOE shares the results of completed GATEWAY demonstration projects, publishing detailed reports that include analysis of data collected, projected energy savings, economic analyses, and user feedback. Report briefs summarize key findings in a quick-scan format. Both the reports and briefs are available as Adobe Acrobat PDFs.

Completed Special Reports

SSL Adoption by Museums: Survey Results, Analysis, and Recommendations
A GATEWAY report that summarizes the results of a survey of the museum community regarding conversions to solid-state lighting in museums. Responses provided real-world insight into how LEDs are being incorporated into museums, and what successes and hurdles have been encountered in the process. (November 2014)
Museums Report
Museums Report Brief
See other GATEWAY museum resources

Photo of a sidewalk at night with a bench in the middle and streetlights on either side.

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)
Pedestrian Lighting Report

Photo of a dark wall with three LED lights shining on it.

Dimming LEDs with Phase-Cut Dimmers: The Specifier's Process for Maximizing Success
This report reviews how phase-cut dimmers work, how LEDs differ from the incandescent lamps these dimmers were originally designed to control, and how those differences can lead to complications when attempting to dim LEDs. Providing both general guidance and step-by-step procedures for designing phase-controlled LED dimming on both new and existing projects—as well as real-world examples of how to use those procedures—the report aims to reduce the chance of experiencing compatibility-related problems and, if possible, ensure good dimming performance. (October 2013—Updated to include information on Burden Museum demonstration, August 2014)
Dimming Report

Photo of a dark wall with three LED lights shining on it.

Color Maintenance of LEDs in Laboratory and Field Applications
The GATEWAY program summarized color shift data of LED lamps used in real-world applications as well as LED products monitored by the CALiPER program in a lab environment. LED color shift is a cause of early failure for some products, especially in applications such as museum lighting, where visual appearance is critical. The report discusses the metrics used for communicating color shift, provides guidance on how to monitor chromaticity and what to look for in manufacturer warranties, and reviews the physical changes shown to lead to color shift in some LED packages. (September 2013)
Color Maintenance Report

Photo of cars in a parking garage with an LED fixture on the ceiling above.

Occupancy Sensors in LED Parking Lot and Garage Applications: Early Experiences
The GATEWAY program summarized and compared experiences from field installations of occupancy sensor-controlled LED lighting at four separate sites: two parking structures and two parking lots. Occupancy sensor systems are gaining traction as an effective approach to reducing energy use, and can potentially enhance the savings from an already efficient lighting system. Several issues that influence savings need to be considered, however, as reflected by the broad range of outcomes from these installations. (October 2012)
Occupancy Sensor Report

Photo of a lighting design lab space with a person standing at right.

LED T8 Replacement Products: Seattle, Washington
At the Lighting Design Lab in Seattle, LED T8 replacement products were compared to their fluorescent counterparts. These "best in class" examples of LED products are approaching linear fluorescent systems in performance, in some cases showing superior application efficacies. Challenges remain, however, with the cost of the LED systems, as well as with their overall levels of illumination. (May 2011)
LED T8 Replacement Product Study