Stairwells account for about 2% of multistory commercial building floorspace, with an average of one light fixture for each 58 sq.ft. of stairwell, according to the International Facility Management Association. It is trafficked 3-5% of the average day. This application has emerged as a strong potential opportunity for energy-saving controls. In the near future, in […]
High bay lighting controls represent a significant opportunity to cut overall energy consumption. Learn more about how they can increase energy savings and reduce wasted energy consumption by downloading a free whitepaper, High Bay Occupancy Sensors: Delivering Energy Savings and Fast Return on Investment, from Sensor Switch free here (PDF).
Implementation of a proper control system for lighting can be critical for a building to earn LEED certification, as energy performance is the largest driver of the points needed to qualify. It is also important to note that more accurate monitoring and control of energy-intensive systems like HVAC and lighting help keep energy costs in […]
Although the national economic recovery is now two and a half years old, construction spending has continued to contract. A multitude of factors prevented a recovery for this beleaguered industry in 2011. Lenders that have been extremely reticent to finance construction projects, budget shortfalls at all levels of government, the ripple effect of overbuilding, depletion […]
Designing LED replacement lamps that are compatible with residential dimmers is complex given the diversity in product performance, creating a challenge for manufacturers to design lamps compatibel with a wide range of dimmers. On behalf of ASSIST, the Lighting Research Center investigated dimming performance of a range of LED replacement lamps, CFLs and incandescent lamps […]
by Jim Brodrick, Department of Energy As more and more LED lighting products have come onto the market, one issue that has generated considerable confusion is dimmability. As discrete devices, LEDs are fully dimmable, and as a result the technology has long been touted as being more suitable for dimming than other lighting technologies. Many […]
In July 2011, the Department of Energy recognized the ASHRAE/IES 90.1-2007 standard as the new national energy standard, superseding the 2004 version. In a bold move, on October 19, 2011, DOE recognized the 2010 version of 90.1 as the new national energy standard. By October 18, 2013, all states in the United States must put […]
Consulting-Specifying Engineer has published an article by Brian Baumgartle, PE, LC, LEED AP of CMTA Inc. about lighting and control changes in the ASHRAE/IES 90.1-2010 energy standard, recently recognized by the Department of Energy as the national energy standard effective October 2013. Check it out here.
Last month at LightingControlsAssociation.org, we published an article about how to establish daylight zones in sidelighted (windowed) building spaces. We looked at an industry rule of thumb and then how the latest generation of energy codes and standards address it. In review, when designing an energy-saving daylight harvesting control system, a critical decision is to […]
When designing an energy-saving daylight harvesting control system, a critical decision is to establish lighting control zones, identifying lighting loads to be separately controlled. Before this decision can be made, however, we must first determine the daylight zones. A daylight zone, also called the daylight area (expressed in square feet), is defined by the ASHRAE/IES […]