Research

Editor’s note: This is the executive summary of the Commercial Lighting Market Attitudes Study, which I produced in 2004 based on surveys of participants across the commercial lighting product sales channel. I’ve been receiving some renewed interest in the study, which people have found valuable, so I decided to offer the report’s conclusions here. What [...]

I recently authored an article for the Lighting Controls Association about a recent Energy Center of Wisconsin study demonstrating that proper commissioning of daylight harvesting lighting controls can lead to higher energy savings. But an even bigger lesson, I believe, can be found in commissioning all automatic lighting control systems. Read it here.

Precision-Paragon [P2] recently published the results of its Energy-Efficient Lighting Industry survey, distributed to more than 4,000 energy efficiency professionals. The survey results show that 77% of survey respondents expect their energy-efficient lighting revenue to grow in 2013. The survey also suggests that automated lighting controls, such as occupancy sensors, are being specified in nearly [...]

Roundabouts, also known as traffic circles, are increasing in number across the U.S. These intersections generally increase traffic flow while reducing the severity of automobile accidents. However, as relatively new traffic features, modern roundabouts are sometimes described as confusing for drivers. One difference between roundabouts and conventional cross-type intersections is the location of pedestrian crosswalks. [...]

The U.S. Department of Energy (DOE) has released an exploratory CALiPER study on the problems and benefits likely to be encountered as LED products intended to replace linear fluorescent lamps become increasingly popular. Eighteen lighting designers and facility engineers compared 24 identical pairs of troffers in a simulated office space. Three of those pairs involved [...]

The Department of Energy recently published the evaluation report from a GATEWAY demonstration in New York City’s Central Park, conducted in collaboration with The Climate Group and the New York City Department of Transportation. LED post-top luminaires from five different manufacturers were installed along paved walking trails and evaluated against the metal halide luminaires that [...]

Summary of a research idea conceived at the Catalonia Institute for Energy Research, Lighting Group. This video explains the potential applications of a novel concept based on LEDs than uses a microprocessing unit to reproduce and read spectra in spaces. Ledmotive: brilliant innovation with LED technology from Josep Carreras on Vimeo.

University of Georgia researchers have fabricated an LED that emits warm white light using a single light emitting material (phosphor) with a single emitting center for illumination. “Right now, white LEDs are mainly used in flashlights and in automotive lamps, but they give off a bluish, cool light that people tend to dislike, especially in [...]

The U.S. Department of Energy has released a CALiPER 2012 Year in Review report that summarizes recent testing results and provides an overview of multi-year trends, available here. Since its inception in 2006, the CALiPER program has tested more than 500 products, revealing a variety of performance trends, holding manufacturers accountable for claims, and identifying [...]