Posts Tagged ‘LED’

High brightness white LEDs are commonly specified to last 50,000 to 60,000 hours at maximum operating conditions. When operated below these maximum conditions, they can last well in excess of 70,000 hours. Well designed fixtures that minimize the lifetime limitations of other system components can take advantage of LED longevity to deliver terrific reliability.

In order to understand the value that this lifetime delivers to lighting users, first one must understand lifetime as defined by LEDs versus traditional light fixtures. LED fixture manufacturers define fixture end of life as a 30 percent reduction in output. This is contrasted with traditional lighting like fluorescent, which typically suffers complete lamp failure. Because fluorescent lamp lifetime is defined as an MTBF, half of the lamps are dead and require replacement by the lifetime rating.

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We announce the launch of  9 LED Flashlights Series for consumer electronics. These flashlights contain all advantages of LED lighting: lower power consumption, long life span, less heat and absolutely green. Besides, the price of our 9 LED flashlights gets close to traditional flashlights.

Main Features of one sample

1. LED Quantity: 9 LED
2. Brightness: 11,000 to 13,000mcd
3. Dimension: Dia.28.7 x 97mm
4. Weight: 63.8g
5. Nylon strap included
6. Battery Type: 3xAAA Batteries (not included)
7. Life Span: Doesn’t require replacing and lasts for up to 100,000 hours 

You may find more in http://www.ledlightsorient.com/led-flashlights-c-3.html

The Advantages of LED Flashlights

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Vishay Intertechnology, Inc. has released a high-intensity white power SMD LEDs in the CLCC-6 and CLCC-6 flat ceramic packages to offer InGaN/TAG on sapphire technology for high optical power from 2,240 mcd to 5,600 mcd.

Designed to reduce costs in high-volume applications, the new VLMW6 series features the CLCC-6 package and a low thermal resistance to 50 k/W, while the VLMW64 series in the CLCC-6 flat package offers a low thermal resistance of 40 k/W and an ultra-low profile of 0.9 mm.

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The junction temperature of high-power LEDs can directly affect the performance and longevity of some LED devices. As the junction temperature rises, a significant loss of output (luminosity) can be expected. The forward voltage of an LED is also dependent on the junction temperature. As the temperature rises, the forward voltage decreases, which can cause excessive current drain on other LEDs in the array. This in-turn leads to thermal runaway conditions and ultimately to the failure of the device. High temperatures can also affect the wavelength of an LED fabricated using gallium arsenide, gallium nitride or silicon carbide. (more…)

Today is an exciting time for the lighting industry as the benefits of LEDs provide significant solutions for design styles, configuration and concepts. With compact size, great efficiency and
long life, LED technology is viable from a performance and economic standpoint moving it into mainstream lighting applications. There are many opportunities for architects, lighting designers and engineers to make a building sustainable, attractive and meet an owner’s needs. For example, sustainable lighting that is seamlessly integrated with the design will add to the building’s aesthetics. Interaction among all building disciplines is required to achieve overarching building design goals. Early commitment and participation of these parties that extends throughout
all stages of the design process is necessary to optimize overall performance and sustainability. Demand for green buildings is being driven on multiple fronts. (more…)

Dynasty B10 Candelabra is a direct replacement for the traditional 120-volt incandescent candelabra lamps. Unique to this design is the patented Dynasty 2,700 K warm white LED as the light source, which emits a 360° horizontal beam pattern. The electronic driver is integrated into each lamp while maintaining the exact shape of a traditional B10 chandelier lamp used in everyday business and home lighting. The lamps are available in clear and frosted, with the popular E-12 (candelabra) base. The total lumen output is 60 to 70 lumens with a power consumption of 1.7 watts, saving up to 90 percent of electrical energy compared to incandescent lamps.
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