固態(tài)照明的最新測試要求

LED光源的引入改變了照明產(chǎn)品的標(biāo)簽和描述方式。而在普通的說法，瓦數(shù)是用來表示亮度，如，“一個60瓦的燈泡”LED的輸入功率和輸出光通急劇變化的相關(guān)性：亮度相當(dāng)于一個15-w LED燈泡確實很亮。改變燈泡性能的必要性導(dǎo)致了聯(lián)邦政府今年對燈泡的要求，要求新的包裝標(biāo)簽——照明事實標(biāo)簽（圖1）。當(dāng)然，有了這個要求，就需要進行標(biāo)準(zhǔn)化測試以獲得標(biāo)記數(shù)據(jù)。

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.?