Lighting

New Kind of Ultraviolet LED Could Lead to Portable, Low-Cost Devices

Light shines bright at precise frequencies that suit commercial applications.

Commercial uses for ultraviolet (UV) light are growing, and now a new kind of LED under development at The Ohio State University could lead to more portable and low-cost uses of the technology. The patent-pending LED creates a more precise wavelength of UV light than today’s commercially available UV LEDs, runs at much lower voltages, and is more compact than other experimental methods for creating precise wavelength UV light. The LED could lend itself to applications for chemical detection, disinfection, and UV curing. With significant further development, it might someday be able to provide a source for UV lasers for eye surgery and computer chip manufacture.

Posted in: Briefs, Lighting
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LRC Evaluates Safety Impacts of Advanced Car Headlight Systems

Crash risks while driving at night are higher than during the daytime, but most roadways in the U.S. do not have roadway lighting. In fact, many state and local governments find it difficult to pay for installing, operating and maintaining roadway lighting. Despite these concerns, the proportion of nighttime driving is not likely to go down in today's round-the-clock economy, making car headlights increasingly important to nighttime driving safety. Through its Transportation Lighting and Safety program, the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute is evaluating the potential for new lighting technologies and approaches to improve driving safety at night, including new car headlight systems.

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Researchers Build A Better Device to Detect Ultraviolet Light

Researchers in Japan have developed a new type of photodiode that can detect in just milliseconds a certain type of high-energy ultraviolet light, called UVC, which is powerful enough to break the bonds of DNA and harm living creatures. Although this radiation doesn't normally reach the Earth's surface, it can leak through to just below the hole in the ozone layer. Monitoring this radiation is a way of tracking the hole in the ozone layer, and photodiodes that measure UVC are also used as flame sensors and for communication in space.

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Silicon Nanocrystals Could Be Safe For Deep-Tissue Imaging

Tiny silicon crystals caused no health problems in monkeys three months after large doses were injected, marking a step forward in the quest to bring such materials into clinics as biomedical imaging agents, according to a recent study. The findings suggest that the silicon nanocrystals, known as quantum dots, may be a safe tool for diagnostic imaging in humans. The nanocrystals absorb and emit light in the nearinfrared part of the spectrum, a quality that makes them ideal for seeing deeper into tissue than traditional fluorescence-based techniques.

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LED Fixtures Brighten Up Allentown Parking Authority

Green Tech Energy Services, working in conjunction with its client, the Allentown Parking Authority, needed lighting fixtures in a multi-level parking garage in Allentown, Pennsylvania. They were looking for fixtures that offered a great appearance, price and quantity. Additionally, they needed products that were DesignLights™ Consortium (DLC) qualified and met their exact specifications.

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LED Lighting Masters the Art of In-Flight Calm

Aboard a state-of-the-art aircraft might be the last place you would think of yourself enjoying a warm “candlelit” dinner, followed by a good night’s sleep under a starry night sky. The truth is, the latest aircraft cabins seek to provide just that – a revolutionary in-flight experience through the use of mood lighting. Mood lighting uses the full spectrum of colors and the ability to change these colors continuously with LEDs to mimic or enhance a sunrise morning or a bright, fresh afternoon, or a cool evening that winds down the day. These lighting effects even seek to reduce your likelihood of jetlag. LED lighting programs can be specifically designed to gradually shift your waking and sleeping biorhythms to match that of your destination city.

Posted in: Application Briefs, LEDs, Lighting, Light emitting diodes (LEDs), Light emitting diodes (LEDs), Interior lighting, Passenger compartments, Interior lighting, Passenger compartments, Aircraft
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High Performance Thermal Management Solutions for LEDs

When it comes to highpower lighting applications in the military and harsh industrial environments, reliability and efficiency are key features to consider. To maximize both of these qualities, lightemitting diode (LED) technology is coming into play with brighter, more flexible lighting solutions. LEDs are longer-lasting, appear brighter and are more versatile and more durable than incandescent and compact fluorescent lighting (CFL).

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Understanding Today’s Energy - Efficient Lighting Certification Programs & Initiatives

The Energy Policy and Conservation Act of 1975 and its subsequent amendments established minimum efficiency standards for lighting products. While the DOE’s mandatory energy efficiency standards and recently-heightened surveillance efforts are designed to ensure manufacturers’ compliance with minimum U.S. energy efficiency requirements, they do not account for all of the “green” lighting certification programs and initiatives active in the U.S. and Canadian markets today.

Posted in: Articles, Lighting, Exterior lighting, Energy conservation, Interior lighting, Interior lighting, Certification
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40W Waterproof LED Drivers

Phihong USA (Fremont, CA) recently introduced a new series of waterproof LED drivers for use in a broad range of residential and commercial applications. Designated the PDA040 series, the LED power supplies are available in constant-current outputs of 700, 1050 and 1400mA at a nominal input voltage rating of 120-277 VAC. The PDA040 series is Class 2 per UL1310 and also complies with UL8750 and UL60950. Standard features on the drivers include over-voltage protection, over-current protection, short-circuit protection, brownout and brownout recovery. Additionally, the power supplies have power factor correction greater than 0.9 and a total harmonic distortion of less than 20%.

Posted in: Products, Lighting
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LED Drivers

Dialog Semiconductor plc (Kirchheim/Teck, Germany) has announced a new solid state lighting (SSL) LED driver that integrates boost and flyback converters into a single IC. The iW3623 offers a universal 100 VAC to 277 VAC input range and output power up to 45W. Dialog’s patented Flickerless™ design achieves a near-zero 100 to 120Hz output ripple and built-in over-temperature protection (OTP).

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