Research

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 [...]

Research by an interdisciplinary team at the University of Illinois found that office workers in windowed spaces scored better on common self-report health and sleep surveys, averaging 46 minutes of sleep per night (measured by sleep monitor) compared to workers without windows. More evidence that appropriately designed lighting may be preventive medicine? Maybe so, though [...]

Researchers at the Natick Soldier Research, Development and Engineering Center are investigating the effects of different types of lighting in military shelters on Soldiers. Specifically, members of NSRDEC’s Cognitive Science Team are examining the effect of lighting on mood, or affective state, as well as visual acuity, cognitive alertness/awareness and the ability to perform tasks. [...]

The California Lighting Technology Center recently tested 26 LED A-lamp products marketed as alternatives to 60W incandescent A-lamps. Data collected on power (W), voltage (V), luminous output (lumens), correlated color temperature (CCT), color rendering index (CRI), rated life, and dimming performance allowed for comparison with manufacturers’ claims as well as current lamp quality standards. The [...]

The rapid development of lighting technologies, particularly solid-state systems using LEDs, has opened a universe of new possibilities as well as new questions about roadway lighting in the United States, which for decades has been dominated by the use of HPS lamps. Other light source technologies have also been angling for roadway market share. There [...]