Assessing the Performance of 5mm White LED Light Sources forDeveloping-Country Applications

Mills, Evan

关键词: 32;    29;    AVAILABILITY;    COLOR;    EFFICIENCY;    ENERGY STORAGE;    LIGHT EMITTING DIODES;    LIGHT SOURCES;    MANUFACTURERS;    OPTICS;    PERFORMANCE;    SERVICE LIFE;    TESTING;   

DOI  :  10.2172/923294
RP-ID  :  LBNL--62620
PID  :  OSTI ID: 923294
Others  :  R&D Project: E67001
Others  :  Other: BnR: 830404000
Others  :  TRN: US200806%%404

美国|英语

来源: SciTech Connect

【 摘 要 】

Some white light-emitting diode (LED) light sources haverecently attained levels of efficiency and cost that allow them tocompete with fluorescent lighting for off-grid applications in thedeveloping world. Additional attributes (optics, size, ruggedness, andservice life) make them potentially superior products. Enormousreductions in energy use and greenhouse-gas emissions are thus possible,and system costs can be much lower given the ability to downsize thecharging and energy storage components compared to a fluorescentstrategy. However, there is a high risk of "market-spoiling" if inferiorproducts are introduced and result in user dissatisfaction. Completesystems involve the integration of light sources and optics, energysupply, and energy storage. A natural starting point for evaluatingproduct quality is to focus on the individual light sources. This reportdescribes testing results for batches of 10 5mm white LEDs from 26manufacturers. Efficacies and color properties are presented.