Advancing the effective use of light for society and the environment.

Thursday, April 14, 2005

General News
Breakthrough Technology Accelerates Solid-State Lighting
Photo: LED fixture with SPE technology implemented.

Scientists at the Lighting Research Center have developed a method known as "SPE" to get significantly more light from white LEDs (light-emitting diodes) without requiring more energy.

“We have developed a technology based on a new scattered photon extraction (SPE) method that will speed up the progress of solid-state lighting and help secure our nation’s energy future,” said Nadarajah Narendran, Ph.D., director of research at the LRC. Compared to commercial white LEDs, prototypes of the new SPE LED technology produced 30-60 percent more light output and luminous efficacy.

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LRC Partners with Boeing to Develop Aircraft Lighting Solutions
Boeing 787 Dreamliner concept
Image courtesy of Boeing

The Lighting Research Center has announced a new partnership with Boeing to develop innovative and efficient lighting solutions for use aboard commercial aircraft. The LRC and Boeing will collaborate on projects to evaluate current aircraft interior lighting designs and to specify new lighting concepts and requirements.

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Got Questions About Lighting and Health?
LIVE! from the LRC logo

LIVE! From the LRC Internet Teleconference is a monthly 90-minute seminar that brings LRC lighting experts straight to your office via telephone and Internet. The next teleconference is on the topic of "Light and Health" and is scheduled for April 20, 2005, 1:00 p.m. to 2:30 p.m. ET. Continuing education credits are available to participants for this seminar.

Responding to demand from many areas of the country, this teleconference will be an "encore" presentation of the very popular LIVE! From the LRC seminar held in June 2004. It will include information on the connections being uncovered in recent research between lighting and people's well-being, alertness, mood, and overall health.

Dr. Mark Rea and Dr. Mariana Figueiro will provide information on the effects of light on circadian rhythm, light and alertness, effective light treatment for people with Alzheimer's disease, sleep disorders, seasonal affective disorder (SAD), and other conditions. The seminar also will include new and updated information from research currently being conducted in this fascinating area of study. Learn more about LIVE! From the LRC

Researchers Use Blue Light to Treat Sleep Disturbances in the Elderly
Photo: Seniors participate in blue-light treatment study

In a recent pilot study, scientists at the Lighting Research Center demonstrated how exposure to blue light can reduce sleep disturbances and increase the likelihood of stable, consolidated sleep in seniors. The study included subjects with Alzheimer’s disease, an illness often accompanied by severely irregular sleep/wake patterns, as well as those without dementia who simply have trouble sleeping. The study built on previous LRC research conducted in 2002. “The consistencies in our research support the theory that blue light can be a powerful, non-pharmacological treatment for sleep disorders in seniors and should be considered in the design and operation of senior housing," said Mariana Figueiro, Ph.D.

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LED Technology Saves Energy, Attracts Shoppers to Retail Windows
Photo: Retail window with LED lighting

Retailers looking to add dazzle to their store window displays may want to consider colored LEDs, or light-emitting diodes. A field study from the Lighting Research Center showed that colored lighting effects created with these tiny lamps can cut lighting energy in retail windows by 30 to 50 percent and attract more attention from shoppers.

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Simple Daylight Harvesting Concepts Offer New Options for Energy Savings
Photo: Example of office daylighting

Lighting Research Center researchers have identified and evaluated new, simple concepts for daylight harvesting, a way to increase energy savings by taking advantage of the natural light entering a space through windows or skylights. The results of the study were published recently in Lighting Research & Technology.

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Industry Group Distributes Guidelines for Reporting LED Life
ASSIST logo

The Alliance for Solid-State Illumination Systems and Technologies (ASSIST), an LED industry group organized by the Lighting Research Center, has published its recommendations defining and measuring LED life for lighting.

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Daylighting Controls Focus of LRC’s Train-the-Trainer Session
Photo: The LRC's Andrew Bierman demonstrates lighting techniques with the Daylighting Controls Simulator

What should a daylight switching system do? What should a daylight dimming system do? Where should daylighting control systems measure daylight in a building? What is the difference between a closed-loop and an open-loop control system? These questions and many more are answered in the Daylighting Controls Practicum developed by the Daylight Dividends program.

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New Outdoor Lighting Classification System in the Works
Photo: Outdoor lighting

Responding to a request by the Illuminating Engineering Society of North America (IESNA), the Lighting Research Center has prepared a new, proposed classification system for outdoor luminaires. The new system redefines light distributions for fixtures used in parking lots, roadways and other outdoor areas.

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LED Lighting Institute Trains Professionals for ‘Next Generation Lighting’ in Successful Hands-on Seminar
Photo: Institute participants experiment with LEDs.

For the last three years, the Lighting Research Center and its LED industry program, the Alliance for Solid-State Illumination Systems and Technologies (ASSIST), have been showing people how this quickly evolving technology works in the real world. Their twice-yearly LED Lighting Institute brings people from all over the world together for a three-day, hands-on seminar. The next LED Lighting Institute will be held April 27-29, 2005.

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NLPIP Revises Two Lighting Answers Reports
NLPIP logo

The National Lighting Product Information Program (NLPIP) has revised two reports in its Lighting Answers series to better address two important lighting issues. The reports were originally released in 2003 and revised in March 2005.

Lighting Answers: Full-spectrum Light Sources answers commonly asked questions such as: What are full-spectrum light sources? How valid are claimed benefits? Are they worth the extra cost? The report proposed a convenient definition for full-spectrum light sources to quantify the extent to which a given light source deviates from a full-spectrum light source. The revision presents an improved calculation method for this new full-spectrum metric. View Lighting Answers: Full-spectrum Light Sources

Lighting Answers: Mid-wattage Metal Halide Lamps answers commonly asked questions about mid-wattage metal halide (MH) lamps. The revision includes new data gathered from testing conducted over a 15-month period (October 2002 to January 2004). It does not include information about any additional products. Readers familiar with the original publication will notice new information about lumen maintenance, color shift, and color variation, located in the question: "What are some important characteristics of MH lamps?" View Lighting Answers: Mid-wattage Metal Halide Lamps

About the LRC

The Lighting Research Center (LRC) is part of Rensselaer Polytechnic Institute and is the leading university-based research center devoted to lighting. Founded in 1988, the Lighting Research Center has built an international reputation as a trusted and reliable source for objective information about lighting technologies, applications, and products. Its mission is to advance the effective use of light and create a positive legacy of change for society and the environment.



© 2005 Rensselaer Polytechnic Institute, Troy, NY 12180 USA.

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