Key Research Accomplishments
Since 2001, the LRC has played an influential role in global LED lighting research and education. Below are the LRC’s key SSL research projects from the last decade.
Developing a Predictive Life Test for LED Systems
In 2009, the LRC began investigating the life of LED lighting systems in order to develop an accelerated, predictive life-test procedure that accounts for both useful life and the possibility of catastrophic failure of a system at any given environment temperature and use pattern.
Estimating LED Life
Early 21st century claims purported LED lighting to last 100,000 hours. The LRC, however, showed that LED life could be far less, depending on the luminaire design and installation. Through its Alliance for Solid-State Illumination Systems and Technologies (ASSIST), the LRC developed a recommended test method for estimating LED life for general lighting.
Understanding White Light Source Color Rendering and Appearance
In 2002, the LRC and ASSIST began a long-term study of subjective
preferences using psychophysical experiments to understand how
observers perceive white light sources and what they prefer in terms of
object color rendering and the white hue or tint of a light source.
LED Lighting for Supermarket Freezer Display Cases
In 2002, the LRC began investigating the possibility of using LEDs in supermarket refrigerator and freezer display cases, where fluorescent lamps are a common but not ideal technology for cold environments.
Professional LED Lighting Education
In 2001, the LRC began offering the first unbiased, research-based workshop for lighting designers, architects, and engineers on how to build successful LED lighting products and applications.
Bringing Advanced, Energy-Efficient LED Lighting to Aviation
Since 2005, the LRC has conducted lighting research as part of the Federal Aviation Administration’s Center of Excellence for Airport Technology. Research in the areas of solid-state lighting and vision science are providing new lighting solutions that benefit the aviation industry.
Improving LED Light Output and Efficacy Through SPE™
The LRC’s Scattered Photon Extraction (SPE™) improves LED light output by up to 60% through the extraction of backscattered photons. The innovative package design combines remote-phosphor technology with optimally shaped secondary optics.
Tools to Evaluate Outdoor Lighting
A global trend to replace conventional outdoor lighting with LEDs led to the development of tools for evaluating and selecting both LED and conventional outdoor luminaires: a new metric rooted in the concept of application efficacy, a free online calculator based on this metric, and methods to assess discomfort glare and mesopic efficiency.
LED Aircraft Cabin Lighting for the 787 Dreamliner
The LRC partnered with Boeing to develop innovative and efficient lighting solutions for use aboard the 787 Dreamliner jet, a next-generation commercial airplane with energy-efficiency and passenger experience in mind.
= ASSIST Project