The first choice for high-power LED lighting into green lighting
Cree's XR-E series of high-power LEDs topped the list of the most ground-breaking technologies of the year (see "WhitePowerLEDLightsTheWayWithA160-LumenOutput" on page 39 of the November 16, 2006 issue). Cree has also spared no effort to improve the XR-E series.
Through continuous improvement in die, package and materials, Cree has launched a series of cold light LED products. These LED lights are "an improved version of the XLamp series with higher efficiency and good color stability throughout their lifetime," said DebLovig, project manager at Cree.
Cold light specification
The above-mentioned luminescence LED lamp can provide a cool white light output of up to 250 lumens - an increase of 56%. Its cool white light output (5000K to 10000K color-corrected temperature or CCT) can reach 114 lumens at 350mA and exceeds 90 lumens per watt.
In addition, Cree has also developed the Dawning series, which is mainly used for ordinary indoor lighting, but is also often used for outdoor applications abroad. The neutral and warm white LED (3700K to 5000KCCT) delivers up to 80.6 lumens at a current of 350mA with a power efficiency of 67 lumens per watt, which is equivalent to the efficacy and color temperature of a compact fluorescent lamp.
"These are the best values ​​for packaged high-power LED reports," said Paul Scheidt, product manager for solid-state lighting products at Cree. The National Institute of Standards and Technology (NIST) validated the results.
The white high-power LED chip is fabricated on a silicon carbide (SiC) substrate with a layer of indium nitride (InGaN) on this substrate. This surface-mounted chip with reflow soldering is only 7x9mm
Solid state light sources are more efficient than traditional light sources and have a longer life. They do not require a lot of maintenance operations, making them a high-priced alternative to many common lighting and backlighting devices. Solid-state light sources are therefore rapidly gaining popularity, often used in office buildings, parking and outdoor lighting, automatic headlights, garage and warehouse compartment lighting, camera flashes and projection displays, and even flashlights.
In fact, LED lighting makes the parking lot and lobby at Cree Headquarters much brighter (Figure 2). More and more lighting equipment manufacturers use Cree's LED light sources in their industrial and household products.
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