Research

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 [...]

The U.S. Department of Energy has completed Series 20 of testing through the DOE Solid-State Lighting CALiPER program, available here. Report 20 evaluates the independently tested photometric performance of 38 LED PAR38 lamps, with results showing significant improvement versus earlier CALiPER testing of similar products. All of the LED PAR38 lamps tested offer substantial energy [...]

Independent of country of residence, the 637 building/design industry practitioners responding to the IALD Certification Survey indicate the seven domains of professional practice researched by the Credentialing Task Force accurately reflect the practice of architectural lighting design (average rating 4.1 out of 5) and are important to the profession (average rating 4.66). The primary purpose [...]

In this brilliant TED Talk, Beau Lotto explores the phenomenon of optical illusions and how the human eye sees objects and reality.