Research

The U.S. Department of Energy’s CALiPER program has released Report 20.4, which is part of a series of investigations on LED PAR38 lamps. Report 20.4 focuses on lumen maintenance, chromaticity maintenance, and catastrophic failure in 32 of the Series 20 LED PAR38 lamps and eight benchmark lamps, which were monitored for nearly 14,000 hours at [...]

I wrote this article for the April 2015 issue of tED Magazine. Reprinted with permission. From walls to paper to plastics to clothing, white abounds in the built environment. Lighting research, however, has focused on the rendering of colors. The color rendering index (CRI), in fact, is based on the rendering of colors by a [...]

Researchers at the Universities of Basel and Valencia recently reported that they have succeeded in laying the ground work for a novel solid-state light source based on light-emitting electrochemical cells (LECs). The group, led by Basel professors Catherine E. Housecroft and Edwin C. Constable, see LECs as potentially advantageous compared to LED because they are [...]

The relationship between lighting and productivity has been the subject of study for almost 100 years, but determining a definitive, quantifiable relationship remains elusive. That was the consensus of a three-person Light and Productivity panel of experts assembled by the National Lighting Bureau as part of its annual forum conducted in conjunction with the EdisonReport. [...]

The January issue of LD+A included a collection of research projects demonstrating how lighting can impact health. Click here for a quick roundup.

The U.S. Department of Energy’s CALiPER program has released another special report on LED lamps that are available through the retail marketplace and targeted toward general consumers. CALiPER Retail Lamps Study 3.2 focuses on lumen depreciation and color shift in a subset of 15 LED A lamps from CALiPER Retail Lamps Study 3. The lamps [...]

HID lamps represent 2% of all installed lamps but 26% of national lighting energy consumption. Mogul-base LED replacement lamps are now being marketed as energy-saving equivalents. In response to a need to objectively evaluate available options, the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute began characterizing the market for and performance testing of mogul-base [...]

The 2014 edition of LEDs and the Worldwide Market for Lighting Fixtures is now available has been published by CSIL, including historical data up to 2013 and 2014-2018 forecasts. In less than 10 years, LED share on the lighting fixtures market worldwide jumped from 1% to 25%. In just five years, LED share will be [...]

Here’s an interesting application for LEDs: growing food on other planets. Researchers at the University of Guelph’s Controlled Environment Systems Research Facility (CERF) are studying LEDs as a light source that can facilitate plant growth in environments where nutrients and electricity are scarce, such as space and even during colonization efforts of other planets. The [...]