Lightfair International - no shortage of LEDs in Vegas
LED manufacturers and lighting suppliers were out in force at this year's Lightfair showcase in Vegas.
|Editor studies LEDs in NeoPac booth|
|Promoting LEDs on the Strip|
|Lotus from Journee Lighting|
|GELcore white LEDs|
GELcore exhibited 1.2 and 3.6 W LEDs each comprising a 10 mm diameter dome on a 1-inch aluminum PCB. Inside the dome are 1 and 3 chips, respectively, emitting at the near UV wavelength of 405 nm together with a phosphor blend that GELcore can tune to give the desired CRI or color temperature.
The 12.2 and 3.6 W LEDs produce 40 and 120 lm, respectively, with a CRI of 80 and a color temperature of 3500K. A 12 W device with an output of 350 lm had a larger diameter dome, as shown in the accompanying photo from last year's show, probably containing 9 chips. The junction-board thermal resistance is 10 °C/W. GELcore will probably release products at 3 color temperatures – 3000, 3500, 4100 K are the likely values – and will allow the market to determine the CRI values.
Lumileds showcased its Luxeon K2 for the first time in the US, and issued a press release extolling the benefits of operating at 1000 mA in situations where 350 mA just doesn't provide enough light – see Lumileds promotes capability of Luxeon K2 at 1000 mA. Lumileds' Keith Scott told LEDs Magazine that Lumileds will likely upgrade the performance of its warm white LEDs this summer, and plans to introduce a warm-white K2 next year.
In August, Nichia will launch the 075 series Dome-type LED, containing a single 800 µm chip with a conformal phosphor coating. These LEDs, designed for demanding optical applications requiring a narrow beam, produce 45 lm at 38 lm/W in cool white, when driven at 350 mA. Later this year, Nichia will upgrade its Rigel product line with a 350 mA, 1.2 W Power Rigel product in a ceramic package, designed for demanding environments such as automotive applications.
As at Light+Building, Seoul Semiconductor estimated that by the end of 2006 it would have a 350 mA LED with an output of 98 lm and efficacy of 84 lm/W in cool white, and 67 lm and 57 lm/W in warm white. This will represent a huge step up from products due out in the third quarter of 2006, which will have an output of 65 lm and 52 lm in cool and warm white, respectively. Seoul also exhibited a 0.5 W Led described as "the world's brightest 5 mm lamp", which produces 20 lm (42 lm/W) at 6500K and 15 lm (31 lm/W) at 3000K.
Tucked away on the Osram stand shared with Sylvania was Osram Opto's Platinum Dragon, the 4-watt version of the Golden Dragon single-chip device. The cool-white Platinum product (warm white is not yet available) contains ThinGaN blue LED chips and can handle up to 1000 mA. The maximum junction temperature is 135°C (compared with 125°C for the Golden product) and the thermal resistance has been reduced to 8-11 °C/W, from 15 °C/W.
The Osram stand also featured several fixtures using the company's LEDs, including track lights from Lighting Science Group that use Ostar Lighting LEDs. Elsewhere, pendant lights incorporated color-on-demand technology, which allows color to be selected by changing the phosphor blend. Also, the booth featured a prototype 4-inch-aperture downlight from Color Kinetics, containing 6 Ostars. The dimmable fixture will be available at a color temperature of either 2700, 3000 or 4200K, and will produce 900-1000 lm. Also, Sylvania introduced a number of module-level products using Golden Dragons – see Sylvania Dragon systems revolutionize white LED illumination
Fraen showcased its custom high-power LED optics solutions , including unique reflectors for Osram Ostar LEDs, a color-mixing TIR lens for Seoul P5 RGB LEDs, a practical DRAGONtape optical assembly solution, and new TIR optics for Luxeon K2 LEDs (see press release).
Optek Technology's new products included a 1-W LED, an RGB version of its 10-W Lednium package, and several novel Led assemblies (see press release).