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Commentary: Guest Commentary: Sapphire Substrate Advances Lead To Brighter LEDs at Lower Costs
 
... The adoption of solid-state lighting is fueling market growth for high-brightness LEDs. It's a competitive market, and each manufacturer is looking for the keys to greater light output at a lower cost. In recent years, the most significant advance in cost per lumen has been the adoption of patterned...

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Plessey Achieves 120 lm/W with GaN-on-Si LEDs in Lab and its GaN-on-Si LEDs to Power 8point3's Linear Lighting Products
LIGHTimes News Staff

November 20, 2014...Plessey Semiconductor of Plymouth, UK reports that the company has agreed to supply its gallium nitride on silicon MaGIC (Manufactured on GaN-on-Si I/C) high-brightness LEDs to UK-based LED luminaire producer 8point3 Ltd. 8point3 plans to use the Plessey LEDs in its new Sabre Architectural range of LED linear lighting products, which will be officially labeled ‘Made in Britain'. Plessey asserts that that recent performance improvements in its MaGIC LEDs have made them competitive with any LED technology.

In related news, Plessey announced that its GaN-on-Si MaGIC high-brightness LED technology has achieved light output of 120 lumens per watt with over 50% light output efficiency.

8point3's Sabre Architectural luminaires employ remote phosphor with a unique light emission design that provides what the company claims to be high system efficiencies and economic life. The Sabre Architectural luminaires come in a wide range of color temperatures, and are said to deliver a uniform and diffuse luminance and appearance without reflections or pixilation. The Sabre Architectural luminaires offer lighting for high lumen areas.

“A technology agreement has also been reached, whereby Plessey will design bespoke LED solutions in the UK to complement 8point3’s ongoing lighting projects,” said Mark Pinnock, Plessey’s regional sales manager for Northern Europe and account manager for 8point3.

Plessey’s range of products for lighting applications is being showcased at LuxLive (the UK’s biggest lighting show) at ExCel London (19-20 November).

Plessey hopes to achieve even greater lm/Watt efficiency soon. Plessey chief technology officer Keith Strickland commented, “Whilst 120 lumens per watt for an LED may be considered ‘acceptable’ to industry, we must remember that we have doubled our LED light output in the past six months.”

“I see no reason why we cannot reach state-of-the-art in LED die output performance within the next six months. This current process technology will become the base for our Application Specific LEDs, the ASLED that bridges the gap between the LED component suppliers and the solid-state lighting fixture designers and OEMs,” Strickland continued.

“The combination of expertise and a sustained period of light output performance improvement in the core LED material is due to our holistic approach to LED development - our in-house experts in epitaxy growth, process development and die design all working together,” said operations director Mike Snaith. “This way of working will continue and strengthen as we drive towards the next generation of higher-efficiency, silicon-based integrated LED solutions and away from discrete, plastic-packaged LED components.”

Osram Opto Semiconductors Adds P 13 to its Soleriq P Series
LIGHTimes News Staff

November 11, 2014...The new Osram Soleriq P 13, a small LED with a high output and the most powerful in its series, achieves a brightness level of up to 6800 lumens (lm). The compact P 13 has a small light-emitting surface measuring just 13.5 mm in diameter. The LED is reportedly ideal for high-powered spotlights in museums and shops as well as for high bay lighting. The new Soleriq P 13 LEDs will be unveiled at the “electronica” trade show in Munich from November 11 to 14 (Hall A3, Booth 107).

The P 13 is available in two versions with different color rendering indexes (CRI). The CRI 80 LED has a brightness of 4000 lm even at high temperatures (85° C, 1050 mA) and can be overdriven to provide up to 6800 lm. The entire package measures just 18 mm x 18 mm x 1.5 mm. The small sized package facilitates compact and bright lighting solutions for indoor spotlights and high bay lighting. For spotlight applications demanding high lumen output, small beam angles, as well as high color quality, the CRI 90 version provides 3300 lm as standard and up to 5600 lm when overdriven.

“Customers could compare the P 13 with the formerly launched Soleriq S 19 due to its similar light output of 4000 to 5000 lm. In fact, the new Soleriq P 13 has smaller dimensions and is therefore the right choice for more compact lighting solutions," explained Lim Kok Peng, product manager in marketing for general lighting at Osram Opto Semiconductors.

With the P13, customers need fewer LEDs to achieve the same light output compared to other products in the Soleriq P series including the P 9 or the P 6. This saves costs. The company says that the small LES allows a simpler lens design which costs less and enables more compact lighting solutions. Binning of the LEDs takes place at 85° C (“hot binning”). The85° C temperature very closely matches normal operating conditions and enables the brightness and color values of the LEDs to be precisely determined in line with their subsequent use.

The LED in the Soleriq family are all based on Chip-on-Board technology for a uniform color and light appearance. The Soleriq family's LES is compatible with the international Zhaga standard. Furthermore, the accessories tailored to the Soleriq family such as connectors, optics and drivers are all available on the market and can be obtained for example via the Osram partner network, LED Light for you (LLFY).

Bridgelux Launches New Chip-on-Board LED Arrays with "Human Centric" Design Approach
LIGHTimes News Staff

October 28, 2014...Bridgelux of Livermore, California USA, will debut its new Vero® Decor Series™ Class A Chip-on-Board (CoB) LED array products at the Hong Kong International Lighting Fair 2014. The launch of the Decor Series Class A arrays marks Bridgelux's new "human-centric" approach to product development and color targeting. The company has started looking at a relatively new metric called the Gamut Area Index along with the Color Rendering Index.

The Gamut Area Index (GAI) in short measures how light and color appeal to and are perceived by the human brain. GAI (Gamut Area Index). The gamut area of a light source is that area enclosed by a polygon within a chromaticity diagram. The greater the separation among the selected points, the greater the gamut area. The Gamut Area Index is the difference between the Gamut Area of a specific light source and a reference light source.

The company contends that while CRI only measures color distortion, the Gamut Area Index (GAI) measures color saturation and strength to more accurately reflect the holistic effect of light and how a person will perceive color. Bridgelux says its Decor Series Class A arrays are engineered at the optimal GAI and CRI combination based on human perception of light.

The company says it will make the arrays available through global channels in mid-November.

Bridgelux says that the new Decor Series Class A arrays are the first products to use the full Class A Color specification from the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute and the Alliance for Solid-State Illumination Systems and Technologies (ASSIST).

In a long term study with funding from ASSIST, researchers at the LRC developed what they call, Class A Color. The study examined preferences in color rendering and how people perceive white light sources along with the white hue or tint of the light source. Bridgelux reportedly developed prototype lamps based on the Class A Color spectral requirements for the LRC to use in field evaluations.

"Class A Color has been broadly tested and 'tuned' to ensure the most pleasing blend of naturalness and vividness based on subjective human perceptions," said Jean Paul Freyssinier, senior research scientist at the Lighting Research Center. "A majority (75 percent) of those tested from around the world agree that Class A Color light sources provide the best color rendering and optimum saturation levels. It's consistent lighting that won't disappoint."

Bridgelux insists that Class A colors are inherently more vivid and whites are their whitest due to a broader spectrum of colors and saturation.

According to Bridgelux, the Decor Series of Class A LED Arrays achieve a balance of color properties that match how people perceive color to provide superior color quality. Bridgelux further asserts that the arrays provide a better return on investment when compared to traditional halogen and ceramic metal halide bulbs.

Decor Series Class A LEDs boast 30 percent less energy consumption, 70 percent less heat generated, and have a projected lifetime of about 20 times longer than halogen or metal halide light sources.

In retail settings, Decor Series Class A LED arrays appeal to people's natural perception of light, helping to drive improved aesthetics, increased visits, customer purchases, and revenue per square foot.

"The launch of our Decor Series Class A LED arrays is a game changer for Bridgelux, our customers and the industry," said Brad Bullington, CEO of Bridgelux. "Light has the power to influence how people behave, what they purchase, their productivity and their mood. Our new human-centric approach harnesses that potential to help our customers create custom light experiences that deliver great aesthetics and a tangible financial impact."

Bridgelux Vero Decor Series Class A arrays will be available in 4000 K and 3000 K CCT. They are designed for applications including high-end retail, hospitality, museums and commercial spaces.

Luminus launches 1W SMD LED with 170° Emission Angle
LIGHTimes News Staff

October 28, 2014...Luminus Devices Inc based in Billerica, Massachusetts, USA, has launched the XNOVA Cube, a 1 watt SMD LED with a 170° viewing angle. Luminus contends that the XNOVA Cube improves system efficacy, reduces cost, and simplifies omni-directional products.

Unlike traditional mid-power LEDs, which Luminus says were originally designed for LCD backlighting, Luminus designed the XNOVA Cube specifically for illumination applications requiring high quality of light. The small 1.9mm by 1.9mm package has a 170 degree viewing angle, which the company claims is the widest in the industry. Luminus claims that the XNOVA cube emits more light than any mid-power LED.

“The XNOVA Cube has opened-up new design options for our customers in the highly competitive panel lighting, linear and omni-directional lamp markets,” said Jim Miller, executive VP of sales & marketing. “They are able to reduce LED count by as much as 30% and at the same time cut power consumption by 10%, which enables further cost reductions in drivers, thermal systems, and optical components.”

Luminus Devices is exhibiting its XNOVA illumination product line at the Hong Kong International Lighting Fair (27-30 October).

Cree Lowers System Costs with New SC5 Platform and XBH50 LED
LIGHTimes News Staff

October 23, 2014...Cree, Inc. has introduced an LED with the company's SC5 Technology™ Platform. The new platform powers the company's Extreme High Power (XHP) LEDs. As with their previous LED developments, Cree has begun approaching LEDs not as the biggest contributor to the cost of a lighting system, but as one of several contributors including the heatsink and the optics. This approach has lead Cree to create smaller and brighter LEDs that operate at higher temperatures. The approach has further lead Cree to develop its XHB50, which the company says doubles light output and greatly lowers system cost. Cree claims its new class of LEDs can reduce system costs by up to 40 percent in most lighting applications.

The SC5 platform and the new class of LEDs use the company's silicon carbide technology. Silicon carbide allows the LEDs to operate at higher temperature (up to 105 degrees C). At the same time, the new LED has double the light output of previous iterations with the same efficiency, but in the same footprint. The LED on silicon carbide that can run at higher temperatures does not need as large of a heatsink. This translates to lower cost for the heatsink. Furthermore, the higher output and higher lumen density means that fewer LEDs are needed for each application, and these take up less PCB space and have a lower PCB mounting cost (because there are fewer). In turn, this translates to smaller and less expensive optics.

Cree says its advancements in epitaxial structure and chip architecture go into the SC5 platform. The XHP50 runs on either 6- or 12-Volts, and has a new solder pad layout that allows either 6- or 12-volt operation without additional circuitry.

The first of the new class of LEDs is the XBH50. The XBH50 has an L90 of 50,000 hours. According to Cree, the longer projected lifetime comes from the LED's ability to operate at up to 105 degrees C. The XHP50 LED delivers up to 2250 lumens at 19 watts from a 5.0x5.0 mm package. Cree contends that at its maximum current, the XHP50 provides twice the light output of the industry’s brightest single-die LED, the XLamp XM-L2 LED, at a similar lumens per watt and without increasing the package footprint.

Chuck Swoboda, Cree chairman and CEO said, “The SC5 Technology™ Platform redefines what is possible in high-power LEDs by doubling the lumens out of a single LED, giving lighting manufacturers the flexibility to innovate significantly lower cost systems. This new platform establishes a new benchmark for LED lumens per wafer, which we believe will define the long-term success of our industry. This also validates our belief that high-power LED technology enables the best lighting system designs and a better lighting experience for end customers.”

“LEDs are no longer the most expensive portion of an LED lighting system, but they fundamentally determine the overall system performance and cost,” said Dave Emerson, vice president and general manager for Cree LEDs. “While other LED manufacturers only promise incrementally lower LED cost, our new Extreme High Power (XHP) LEDs leveraging the SC5 Technology™ Platform directly address the increased burden that thermal, mechanical and optical elements now place on total system cost.”

Philips Lumileds Launches New Luxeon CoB LEDs for Spotlights
LIGHTimes News Staff

October 21, 2014...Philips Lumileds has introduced a new compact COB LED array with a small 6.5 mm light-emitting surface that is ideal for spotlights. The small Luxeon CoB 1202 array boasts the highest center beam candle power available. The company says that its small size makes it perfect for PAR and other directional lamps. The Luxeon CoB 1202s is also available with Philips Lumileds' CrispWhite Technology, which the company says produces a high color rendering index and for rich whites, vibrant reds and other colors.

“The 1202s lifts the bar even higher by producing light output in a smaller, 6.5 mm LES that was only possible previously in 9 mm LES arrays. In addition, the 1202s does so with a superior CBCP, delivering 65,000 candelas at a 10˚ beam angle,” said Ahmed Eweida, product manager for the Luxeon CoB line.

The company first introduced its CrispWhite Technology for retail lighting in July 2014.

“The response has been tremendous. Shop owners and their customers clearly prefer LED lighting with CrispWhite over CDM and halogen,” said Eric Senders, Product Line Director.

The Luxeon CoB range including the 1202s is available in a very warm, 2200K version for applications requiring a candlelight-like glow. Philips Lumileds says lighting designers are using the Luxeon CoB 1202s to produce highly reliable directional lamps. The company has published a full list of compatible drivers, optics and holders to help speed the time-to-market for downlights and spotlights.

Mass Production Begins on Seoul Semiconductor’s Acrich MJT 3030
LIGHTimes News Staff

October 14, 2014...Seoul Semiconductor of Seoul, Korea, made available the Acrich MJT 3030 a new LED in the company's Acrich MJT product family. The company says it improves on performance and enables lower system costs. The Acrich MJT 3030 employs Seoul Semiconductor’s high-reliability Acrich MJT technology. According to Seoul Semiconductor, the MJT 3030 LED offers high lm/$ and improved performance compared to previous versions in a mid-power package.

This new Acrich series measures 3.0mm x 3.0mm and delivers 103 lumens at 40mA at 22V, 25° C, 3000K. The 3030 LED can be driven to a maximum current of 60mA at high voltage to provide up to 155 lumens. At high voltage and 60 mA it consumes 1.5 W for over 103 lm/W efficacy. The company designed the LED for high-lumen applications that require high reliability and low cost. Seoul points out that Energy Star® qualification is easier with the already completed 6,000 hours LM-80 data of the Acrich MJT 3030 LED.

The LED uses the company’s high voltage architecture and its Acrich MJT "Multi-Junction chip Technology". The company claims that the Acrich MJT 3030 LED eliminates the tradeoff between size and efficacy. The LED allows operation in either DC or AC mode, depending on your configuration. The Acrich IC reportedly eliminates the need for an AC/DC converter and is said to improve reliability and simplify integration when making lighting fixtures.

The MJT 3030 boasts low THD and a 0.97 power factor both help save energy and optimize designs. In the DC-mode, according to the company, the low-current use of the Acrich MJT 3030 can reduce the cost of the power supply and lower the number of components. The company contends that the Acrich MJT 3030 LED optimizes performance in both AC and DC configurations.

"The new Acrich MJT 3030 LED combines the improved performance and high lm/$ with the reliability of the MJT technology enabling lighting manufacturers to create new innovative solutions to address a wide range of lighting applications,” said Seoul Semiconductor executive vice president of lighting sales, Jay Kim.

Luminus XNOVA chip-on-board LED Arrays Complete 6000 Hr. LM-80 Testing; Company Offers Limited 5-year Warranty on the Arrays
LIGHTimes News Staff

October 9, 2014...Luminus Devices Inc of Billerica, Massachusetts USA reports that the company’s XNova COB LED arrays have completed 6000 hour LM-80 testing. The company says that the arrays demonstrated robust lumen maintenance and long term color stability under extreme conditions. As a result, the company has begun offering a five year limited warranty for the XNOVA family of chip-on-board (COB) arrays designed for both indoor and outdoor directional lighting applications.

“Our XNOVA COB arrays have already been recognized by customers as having industry-leading efficacy, value, and quality of light, and now we have long term data and the 5 year warranty to give customers peace of mind knowing that their fixtures and bulbs will comply with Energy Star and deliver consistent performance for many years to come," says Jim Miller, executive, VP of sales & marketing for Luminus. "Our mission is to help our customers achieve new levels of performance in their end products, so that they can gain advantages over their competitors, and this 5 year warranty helps our customers confidently position themselves as providers of robust, long lasting bulbs and luminaires."

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