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Extra resources for Advances in Ultra-high Brightness LEDs
Page 23 © Copyright Pira International Ltd 2007 Advances in Ultra-high Brightness LEDs Comparison between different types of high-power LEDs System efficiency The performance of high-power LEDs can be evaluated in terms of the system efficiency, affordability, quality of light, lifetime and reliability. In the recent past, high-power LED manufacturers have made considerable advancements in terms of efficiency and have produced dies for white LEDs, which attain 80 lm/W. However, the negative effects of heat are more pronounced with regard to high-power LED fixtures, as compared to traditional lighting systems.
Ancillary elements for LED modules, such as connectors, are tested according to specifications contained in BS IEC 60838-2-2. Radiation safety The requirements for radiation safety according to BS EN 60825-1 ‘Laser Classification of LEDs for Illumination Purposes’ must be adhered to for lights and all components used in lighting installations with LEDs as ready-to-use equipment. Page 29 © Copyright Pira International Ltd 2007 Advances in Ultra-high Brightness LEDs Regulations Classification in For LED applications in general lighting, the only classes of possible relevance of those accordance with available are the following two: EN 60825-1 C lass 1: Laser and LED equipment that is safe under reasonably foreseeable conditions of operation Class 1M: Laser and LED equipment that is safe under reasonably foreseeable conditions of operation for use with the naked eye.
Com Founded in 1987 and based in Durham, North Carolina, Cree Inc. is a company engaged in the development and manufacture of semiconductor materials and devices based on silicon carbide (SiC), gallium nitride (GaN), silicon, and other related compounds. Its products include LEDs comprising of blue, green, and near ultraviolet LED chips, along with high power packaged LEDs; power switching, radio frequency, and microwave devices; and near UV lasers. The company's LED products consist of electronic components used in various applications, which includes backlighting for mobile products and automotive interior lighting, colour electronic displays, as well as light sources for gaming equipment, consumer products, and other electronic equipment.