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固态照明的最新测试要求
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LED光源的引入改变了照明产品的标签和描述方式。而在普通的说法，瓦数是用来表示亮度，如，“一个60瓦的灯泡”LED的输入功率和输出光通急剧变化的相关性：亮度相当于一个15-w LED灯泡确实很亮。改变灯泡性能的必要性导致了联邦政府今年对灯泡的要求，要求新的包装标签——照明事实标签（图1）。当然，有了这个要求，就需要进行标准化测试以获得标记数据。
Figure 1: All light bulbs sold in the U.S. must now be labeled using the above label formats. In addition to wattage, the labels include brightness measured in lumens and light appearance in CCT (Kelvin). Based on three hours of usage per day, manufacturers must also provide the bulb’s life expectancy in years and its yearly operating cost at an 11¢/Whr electricity cost. (Source: U.S. Federal Trade Commission).
At first, the U. S. Department of Energy (DOE) initiated the CALiPER program to establish a process for qualifying testing laboratories, including verification of laboratory competence, equipment, and experience, along with round-robin testing on a regular basis. But with the advent of SSL testing standards from the Illumination Engineering Society (IES), things changed. As of March 5, 2009, the National Voluntary Laboratory Accreditation Program (NVLAP), which provides third-party accreditation to testing and calibration laboratories, started accepting applications for solid-state lighting (SSL) test methods (LM-79 and LM-80) as part of its Energy Efficient Lighting Products laboratory accreditation program. With the NVLAP process for LM-79 accreditation now available, the DoE no longer conducts its own lab qualification and round-robin testing.
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