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Luminaires from Arquiled with LEDs from Osram Opto Semiconductors Illuminate Supermarkets in the Jerónimo Martins Group
SSLDesign News Staff
February 2, 2012...The Jerónimo Martins Group is among the first European retail companies to equip its new stores entirely with LED lighting. According to Osram Opto Semiconductors whose Oslon LEDs power the fixtures produced by Portuguese lamp manufacturer, Arquiled, switching to LEDs at its stores will save the company 50 percent of its lighting energy costs in future. The retail stores will also save because of the intelligent light management system of the luminaires supplied by Arquiled.
At the beginning of the project, Arquiled's analyzed the retail chain’s lighting requirements. Based on the results, Arquiled developed a luminaire concept to meet the special needs of supermarkets. Osram Opto notes notes that LED lighting not only offers the advantage of a long service life and the associated low maintenance costs, but is also ideal for direct product illumination. One important trait of LEDs used for retail lighting, is that they generally emit very little thermal energy and do not heat up the objects they are illuminating and can therefore be positioned closer to products without damaging them.
Three Arquiled modules are to be used at the Jerónimo Martins in Tavira: the Arquiway, a module comprising 4 Oslon SSL LEDs; the Arquistore, with 72 Oslon SSL LEDs per luminaire; and finally, Arquishelf luminaires, which will provide special shelf lighting with 56 Oslon SSL LEDs, illuminating products in the ideal color temperature and displaying them at their very best.
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Salazar, Chu On Hand at Lighting Ceremony at National Mall
SSLDesign News Staff
January 31, 2012...At a lighting ceremony put on by the National Park Service and the Trust for the National Mall, Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu were on hand to celebrate the installation of LED lights on the Mall. The LED light fixtures, were donated by Osram Sylvania and installed pro bono by Pepco, the electric utility that serves Washington, D.C. The LED fixtures are expected to reduce lighting energy use for the streetlamps by up to 65 percent.
Salazar and Chu were joined by Caroline Cunningham, President of the Trust for the National Mall, Bob Vogel, Superintendent of the National Mall and Memorial Parks and leadership from Osram Sylvania, Pepco, and Siemens Corporation, Sylvania’s parent company.
Osram Sylvania contributed 174 LED bulbs and the retrofit kits for the historic bronze streetlamps that line the Mall from 3rd to 15th streets. The kits replaced the Mall’s high intensity discharge (HID) and compact fluorescent lighting (CFL) with solid-state lighting.
The Department of Energy notes that new LED technology provides a better-lit a atmosphere for visitors after dark, while preserving the architectural integrity of the original fittings. In addition to being brighter, the technology lasts longer than most conventional light sources.
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Sedona Art Gallery Upgrades to LED Lighting and Saves Money
SSLDesign News Staff
January 31, 2012...The Windrush Art Gallery in Sedona, Arizona USA, decided to go green by taking advantage of subsidy programs from utility provider, Arizona Public Service, and upgrading to LED lighting.
John McCullough, the owner of Windrush Gallery, has already seen a big drop in his electric bill for January. McCullough expects to save $3,136 per year between energy savings and maintenance cost savings. McCullough also noticed that his gallery is about thirteen degrees cooler than before, because the LEDs produce less heat than the old halogen bulbs. He expects this to translate into additional savings this summer.
“The light quality of the LEDs makes the paintings come alive,” said McCullough, and he added that he is already receiving positive feedback from customers and the artists featured in his gallery.
Windrush used the services of LED lighting and energy efficiency company, Nularis Energy Solutions to make the upgrade.
“Nularis works closely with utility companies across several regions in Arizona and the U.S. to get subsidies for our clients,” Era Tadevosian, Nularis’ Vice President of Sales said. “In some cases, utilities companies have paid for more than half of the total project cost with these subsidies. Not only does our client see immediate savings on his or her energy bill, but the utility will actually write them a check.”
The Arizona-based utility company, Arizona Public Services (APS), paid for one-third of the cost of the project, as part of its kilowatt-shed rebate program that encourages upgrading to energy efficient lighting. “The rebate check definitely made it a lot easier for me to afford,” McCullough said. McCullough invites people to take a look at the new lighting, as long as they stop to admire the art too.
North Carolina Water Reclamation Facility Chooses Cree LED Lighting
SSLDesign News Staff
January 31, 2012...South Durham Water Reclamation Facility reportedly installed LED lighting from Cree, Inc. as part of a city-wide goal to reduce energy usage and improve nighttime visibility and overall facility safety. Cree asserts that the new Cree lighting simultaneously addresses the facility’s need to improve safety and light levels as well as the need to reduce energy usage and maintenance costs.
The South Durham Water Reclamation project was part of an overall effort by General Services, Community Development, Water Management, and the City-County Sustainability Office to reduce energy use in the City. Forty-five Cree The Edge® LED area luminaires were installed in the processing area and at the front gate of the facility. The facility operates 24x7 and monitoring of the system often occurs at night.
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Commentary & Perspectives...
What is the DOE's role in technology development for LED lighting?
Guest Commentary: James Brodrick, SSL Program Manager, US Dept of Energy
January 26, 2012...We recently asked Dr. James Brodrick, SSL Program Manager for the US Department of Energy, what the sustaining role of the DOE is in the basic science and technologies underlying the LED and solid state lighting industries. Jim has been a powerful voice championing the healthy technology and market development of LED lighting, and was kind enough to share his views in some detail.
Researchers have made great progress in the efficacy of LED packages, to the point where many people are asking if they are "good enough". Why shouldn't DOE just let industry take over now and move on to other things? The answer in part depends on how much energy savings is "needed" from SSL and in part on one's assumptions about what industry will do on their own going forward.
Max Possible... As to the first question, DOE has taken the position that we should maximize the potential energy savings. The goal should be to wring all the efficiency we reasonably can out of the technology, and not be satisfied with being able to compete with some fraction of incumbent technologies. At the present time, we're perhaps a bit more than half way to what DOE believes is the ultimate capability; why should we stop now?
State of Today... The second question is a lot more complicated. Do we believe industry will continue to drive the bandwagon on their own? There is some evidence that there is competition for the most efficacious products in what have become the standard platforms: GaN pc-LEDs on sapphire or SiC. But recent efficacy gains have been realized through either lowering the current density (sidestepping droop) or by using white pc-LEDs in concert with monochromatic reds (sidestepping phosphor spectral limitations and reducing Stokes loss). Both are excellent choices but they do have their limitations. Lowering current density either with larger LEDs or more of them tends to increase costs. Using monochromatic red LEDs results in additional complexity for drivers, especially when dimming is needed, but also to account for variable ageing rates and temperature sensitivity, both of which add cost and may reduce reliability.
Take it to the Next Level... The obvious "science" opportunity is to find a way to overcome the fundamental limitations that these work-arounds are addressing: Put most simply, dramatically reduce or eliminate current droop and find a way to realize an efficient color mixed solution to eliminate Stokes loss. There are of course other challenges, especially if one moves beyond the devices into the end products. But these challenges are presently the big ones. In fact, while practical products continue to improve, we have not seen the kind of basic breakthroughs that we would like to see in a while. The greatest progress is likely to be step-like, not incremental. Finding promising "steps" that represent real breakthroughs would seem to be a legitimate role for publically supported science work.
Just do It Sooner... Another value of supporting basic development is
the notion of acceleration of progress. There is a fairly logical argument that
says industry may prefer to avoid or delay a major change in the platform, choosing
to maximize the return on investments they have already made. It would seem
to be a difficult argument to gain support for internal research if the outcome
would be to obsolete millions of dollars of expensive equipment. More effort
and funding by industry is likely to go into specific product development with
incremental but not dramatic efficiency gains, just enough to remain competitive.
So while competition may eventually approach to some extent the ultimate capability
of LEDs, it might take a lot longer, thus delaying higher energy savings.
DOE looks to focus its resources on exploring fundamental science challenges
and pathways that may lead to the next “step” or breakthrough. We
look forward to continuing the discussion with the R&D community and industry
at the upcoming Transformations
in Lighting - 2012 DOE Solid State Lighting R&D Workshop in Atlanta,
Jan 31- Feb. 2 (on-site registration is available).
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