"2011leds Conference held in San Diego, California, United States,The lighting program director of the U.S. Department of Energy (DOE) JimBrodrick made ??entitled "LED commercial status and market forecast report,The report describes the successful technology of solid-state lighting (SSL) and limit the technical shortcomings of LED use in other applications. The Brodrick First Department of Energy Concerned about SSL and LED panel lighting technology investment.Brodrick said.All seven kinds of traditional lighting applications LED lighting alternative,May be annual energy savings of 233 megawatt-hours (TWh) of electricity - enough to support nineteen million household electricity. Brodrick in the center of the report describes the the SSL industry situation in the United States,Talked LED panel lightingproducts,He explained: "If you start from a blank sheet of paper and come up with a product that is really good."He also added that good design must solve a fixture in all aspects, including the LED chip, optical, electronic, thermal management and mechanical design. Brodrick said.LED used in recessed downlight lighting, outdoor area lighting, 2x2 feet are perfect dark the lights trough lighting and refrigeration lighting,LED applications with only minor alteration of a light bulb lamps, linear replacement lamps and concave circular ceiling lighting performance is not so good.But.Linear type 4 feet LED lamp has been gradually improved, and close to the fluorescent efficiency, but the directional LED light output and distribution remains than fluorescent like the light diverges into the entire cylindrical type. Nevertheless, Brodrick said,LED lamp light output and cost advantage will still be applied in some applications,Such as those hard-to-reach places suitable for longer life of the LED lamp.He also said that the LED lamp of constant vibration and extreme climate region is still a good choice.Another example those containing only a small modification of a light bulb lamps, Brodrick said LED used this technology has been getting better and better, but they are generally smaller than the incandescent light output, light color quality and light distribution. Brodrick also describes the Department of Energy's most recent test:The Department of Energy has purchased 33 LED lamp products tested eight large retail stores in the United States,The results show that most of the failure to meet the basic performance parameters, consumers are more satisfied with incandescent or halogen lighting effect. In color quality, Brodrick said,LED manufacturers have made significant improvements,More stringent grading lamp manufacturers beneficial.The Department of Energy will continue its multi-year program of work of the SSL plan to improve the lumen output and performance goals. In terms of performance, Brodrick said, we're fighting the cold white light 258 lumens / watt target to 2020.