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LD+A Research Matters: Core Concepts

05/01/2011

LD+A— Core sunlighting is a practical, natural alternative for interior illumination deep within a building. Unlike other solar technologies, core sunlighting involves capturing sunlight at the building envelope, concentrating it, transporting it and regulating its release deep within the building at useful indoor lighting levels, typically only 1 percent of outdoor illumination. Significant electrical energy savings can be realized if the system incorporates automated electric lighting controls that substantially dim or completely turn off the electric lights.

LD+A Research Matters: LED Retrofit Options for Linear Fluorescent Lighting

03/01/2014

LD+A – Tubular fluorescent lamps comprise 80 percent of the lamp inventory in the commercial sector, or about 1.7 billion lamps, according to a U.S. Department of Energy report. As the lighting industry moves rapidly toward solid-state lighting, three main LED retrofit strategies have emerged for this very large segment of the market: tubular LED lamps, LED retrofit kits and dedicated LED luminaires.

LD+A Research Matters: Eyes on the Road

08/01/2013

LD+A – CLTC researchers incorporated passive infrared (PIR) occupancy sensors and networked controls into a test set of dimmable LED roadway fixtures. The adaptive street lighting system yielded energy savings 27 to 42 percent greater than when the fixtures operated at a static level. All occupants, 100 percent, were detected by the PIR occupancy sensor selected for field testing, whether they were traveling on foot, by bicycle, on a motorcycle, or in an automobile.

DC Complex Installs New Lighting in Garage to Reduce Crime Threat

04/01/2013

The New York Times – Parking garages are the third most frequent place for crime in the U.S. Security professionals agree that parking garage design influences the level of crime significantly. The easiest way to deter criminal activity in preexisting structures is by installing bright, white lights, coupled with occupancy sensor controls. 

LD+A Research Matters: Relamping Retail

04/01/2013

LD+A – As retail stores make efforts to improve their sustainability and energy efficiency, a growing number are considering making the switch to directional LED replacement lamps. Compared to traditional halogen or incandescent sources, LED alternatives are about 75 percent more energy efficient, on average, and they last up to 25 times longer, but efficiency and long life are not enough. 

Let There Be Light

03/01/2013

The Parking Professional – Michigan State University (MSU) has adopted a strong on-campus sustainability initiative. Adopting these standards for energy savings requires a challenging operating specification to follow, and MSU launched a major lighting overhaul in the parking garage at the Wharton Center last fall. 

LD+A Research Matters: From Walls to Walkways

11/01/2012

LD+A – The University of California, Davis, unveiled one of the most advanced outdoor lighting systems in the country this past June. Dubbed the Adaptive Campus Control System, it integrates over 1,600 individually addressed, dimmable LED luminaires with various applications – streetlights, wall packs, area lights, and post tops – into an advanced, wireless lighting controls network.

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