162 TECHNOLOGY / ANNUAL LED ROUND UP
Figure 5: Unparalled LED performance from Soraa for their new LED technology.
– 90mA; • Forward voltage of 100V or 200V.
Soraa: launched its flagship product, the Soraa LED MR16 lamp based on its new GaN on GaN (gallium nitride on gallium nitride) solid-state lighting technology. Although a new company, Soraa is founded by Shuji Nakamura, the father of the modern white LED, and other leading scientists. The new product is the first LED lamp to provide superior performance to a traditional halogen MR16. It is also the first LED lamp to provide halogen-equivalent brightness without requiring a mechanical fan and payback within months, not years. The GaN on GaN technology requires a much smaller die footprint to achieve the same light output as processes for LEDs on non-native substrates such as SiC, Sapphire and Silicon. The production quality means that Soraa can typically achieve 1000x fewer disloca- tion densities (or defects) than GaN on silicon or sapphire and achieved improved thermal performance. The 50W MR16 product has a perfect LED crystal structure to deliver a bright (allow- ing 5-10 times more lumens to be generated per unit volume), highly-focused, controlled beam with the ability to produce a high colour rendering index and centre beam candle-power to match a standard halogen lamp. The lamp’s elegant, single-source LED design provides crisp object definition with solo shadow, uniform colour and a perfect beam pattern. Lamp colour rendering is available in stan- dard and high CRI versions. The standard version is offered at either 2700K or 3000K and 80 CRI. The high CRI version is offered at either 2700K or 3000K and 95 CRI. To achieve high colour rendering with deep red (R9>90), this product employs ‘violet pumped’ triphosphor, achieving a closer match to the blackbody than conventional two phosphor ‘blue pumped’ LED. The performance of the GaN on GaN tech- nology can be seen in figure 5 that shows external quantum efficiency up to 73%, showing very low LED droop as current is
increased to 1A and delivers up to 850mW of power at 410nm (violet). Toshiba: Toshiba launched its new range of LED downlights, E-CORE 1100 and 1600 (fig- ure 6). These new downlights use Toshiba’s Light Engine LED which is an LED module complete with on board driver, optic and thermal management interface. This Light Engine means that the LED light source can be easily upgraded or changed making a versatile and future-proof solution. Unlike conventional LED luminaires where the chip set is hard fixed to the unit, the E-CORE 1100 and 1600 are able to have their LED engine changed or adapted to suit the lit space and customer requirement. As LEDs are constantly improving in ef- ficiency, the downlights can be upgraded to the latest version with increased efficiency without major alterations to the luminaire design or a complete change of luminaire. The Light Engine is Toshiba’s contribution to the Zhaga consortium under Book 6 making the inter changeability of LED light sources easier and cross-compatible. With its easy twist and lock solution, the Light Engine is easy to install and also pro- vides 40,000 hours (L70) life and good effi- ciency and high quality beam optics. Adding to these excellent features, the downlights can be dimmed using trailing edge dimming to extend the energy saving potential even further.
MARCH 2012 Cree: expanded family of Mid-Power light- ing-class LEDs with the launch of the XLamp ML-C and ML-E LEDs in a compact 3.5mm x 3.45mm footprint (figure 7). Designed to accelerate the adoption of LED light- ing, the expanded XLamp ML family now offered red, green and blue colour options, high-voltage and three different price-per- formance options in the ML package. The ML LED high-voltage options can enable the use of more efficient, smaller drivers to lower cost for applications such as LED replacement lamps. The ML-C LED delivers luminous flux up to 37 lumens in cool white (5000K) and up to 31 lumens in warm white (3000K), both at 100mA. The series versions of XLamp ML-C and ML-E white LEDs have
typical voltages of 6.4V and 9.6V, respec- tively, at 50mA. Nichia: announced the updated B version of their popular low power 157 package. With 127lm/W, the 157 has become a popular choice for applications ranging from fluo- rescent tube replacements to emergency lighting and bulb retrofits. Osram: launched the Duris P5 which offers a luminous efficacy up to 110lm/W (colour temperature 3000K) and an average lifetime of more than 50,000 hours, even at high currents and temperatures. Furthermore, this highly efficient LED is the first of its kind on the market for medium-power classes with particular resistance to adverse environmental conditions. Long-term tests with corrosive gases such as sulphur or chlo- rine cause no harm to the LED, without in- ducing a significant luminous flux decrease. Nor did long-term tests under sauna-like conditions, with considerable temperatures and high humidity levels, have any adverse effect on the LED. In a package of 2.6 x 2.2mm2
with colour
temperatures of 3000K; 4000K; 5000K and a minimum CRI > 80 the Duris P5 provides up to 33 lm at 100mA and up to 56 lm at 200mA. The Duris P5 is ideal for large area lighting fixtures such as 600mm x 600mm LED panel lighting. Sharp: launched its new range of Pico ZENIGATA 0.2W to 0.6W (0.2W (1 die); 0.3W (2 dies); 0.5W (3 dies); 0.6W (4 dies)); 2.8 x 2.8 x 1.9mm LED series. The product uses low thermal resistance of ceramic sub- strates for efficient thermal management and high levels of heat release and reliabil- ity in addition to: • Availability in 0.2W, 0.3W, 0.5W and 0.6W versions;
• Dome-shaped encapsulation to enhance light extraction;
• High CRI of min. 80 for all CCT ranges; • Luminous flux (typ.) of up to 70 lm; • Luminous efficacy of up to 130lm/W; • Compact dimensions: 2.8 x 2.8 x 1.9mm;
• Long lifetime: >40,000 hrs (depending on operating conditions);
• Operating temperature range: -30° to +100°C;
Figure 6: Toshiba’s E1600 downlighter range.
Figure 7: The Cree ML-C launched in March.
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