The Lighting Controls Association recently published a whitepaper I wrote about the 2012 Commercial Buildings Energy Consumption Survey, published in stages this year by the Department of Energy. The 2012 CBECS provides an estimated profile of the U.S. commercial building stock based on an interviewed sampling. Information includes number of buildings, floorspace, age, building type, [...]

The Illuminating Engineering Society of North America (IES) recently announced the establishment a new committee: Resilient Lighting. The purpose of the Committee is to actively research, develop consensus of best practices, write standards documents and educate the profession on lighting equipment and recommended practices for lighting that must survive and perform during and after adverse [...]

My lighting column in the March issue of ELECTRICAL CONTRACTOR covers a new University of Illinois study that attempted to link daylight exposure to quality and duration of sleep among office workers: “Recently, a multidisciplinary team at the University of Illinois, Urbana-­Champaign, set out to determine the effect of daylight on the quality and duration [...]

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 [...]