Lighting

Metallurgists Use Microwaves to Create Nanocrystal Semiconductors

University of Utah metallurgists used an old microwave oven to produce a nanocrystal semiconductor rapidly using cheap, abundant and less toxic metals than other semiconductors. They hope it will be used for more efficient photovoltaic solar cells and LED lights, biological sensors, and systems to convert waste heat to electricity.

Posted in: Application Briefs, News, Lighting

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Pet Foods Facility Anticipates Less Than Two Year Payback with LED Lighting

The new 300,000 square foot Diamond Pet Foods facility in Ripon, Calif. went online in May 2012 with more than 500 high-efficiency, Class II Div 2 LED fixtures by Dialight. Through combined energy and maintenance savings, the company expects a full return on its investment in less than two years and will benefit from improved visibility thanks to the clear, white light of the LEDs.

Posted in: Application Briefs, Lighting

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LED Tube Lamp Brightens Auburn SuperMall With 50% Less Energy

Aleddra LED Lighting, a business unit of Lightel Technologies, Inc., recently partnered with management at the Auburn SuperMall in Auburn, WA to improve the quality of light throughout the mall while at the same time reducing lighting energy consumption by 52%.

Posted in: Application Briefs, Lighting

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Lighting Company Retrofits Headquarters With Edge-Lit Light Guide Technology

Global Lighting Technologies, a manufacturer of LEDbased, edge-lit light guide solutions for general illumination applications, has retrofitted its North American sales & engineering headquarters with LED ceiling lights. In a classic example of practicing what it preaches, GLT has replaced the facility’s existing fluorescent lights with its UL-certified LED-based 2' × 2' and 1' × 4' ceiling lights throughout the building. The new lights utilize GLT’s edge-lit light guide technology, where the LEDs are strategically spaced along one or two edges of the light guide to achieve high levels of efficiency using the fewest LEDs, with the highest possible uniformity. Each of the ceiling lights utilizes 100 LEDs, with 50 LEDs spaced along each of two edges of the 2' × 2' downlights, and 100 LEDs spaced along one edge of the 1' × 4' ceiling lights.

Posted in: Application Briefs, Lighting

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Plymouth (U.K.) City Council Switches to Solid-State Lighting

Plessey is working closely with Plymouth City Council in the U.K. to help achieve the Council's ambitious carbon reduction strategy for all their managed buildings and infrastructure. Plessey is replacing the existing fluorescent lighting in Douglass House with solid-state LED luminaires that combine design and lighting excellence with energy savings.

Posted in: Application Briefs, Lighting

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LEDs Go Organic: The Science behind OLED Lighting Systems

Organic is a term more often associated with vegetables than lighting systems, but some LED manufacturers are now incorporating organic molecules into their products to meet specific application demands. The result is a new type of LED system that provides a broad illumination area and extraordinary color rendering.

Posted in: Articles, Lighting

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Single-Stage vs. Two-Stage Drivers

Weighing the Tradeoffs in LED Lighting Designs The key circuit elements in an LED lamp are the LEDs, the optics, the casing (including heat-sinking) and the driver. The driver now represents anywhere from 10% to 40% of total bulb cost, so selecting the right topology is crucial to delivering the most cost-optimized design. In order to achieve a long operating life, designers must carefully consider the types of components used, their circuit location and the temperature/power dissipated. Size limits are also a challenge for small bulbs.

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