在節能的意識催化下,人們應用LED燈具的照明產品逐漸成為常態;在日常照明中以白光LED燈具取代螢光燈、白熾燈勢在必行。除了眾所周知的長壽、低耗能的特性外,若單就白光LED光源的光譜比較,即可發現其多變的性質,這同時也造成白光LED燈具對人影響的多樣性,至今仍無可靠答案。明確地說,本研究探究其間差異對人的影響,以為挑選燈具之參考。 本研究首先彙整生理及心理因素調查LED光源和人關聯性之相關理論,以提出其人因工程研究之理論架構,並蒐集及測量市面販售之白光LED燈具的多項參數。接著建立光環境實驗室裝設本研究蒐集之燈具,並進行受測者之生理實測及心理問卷作答。在實測及問卷資料建立後,透過統計方式分析燈具參數與受測者資料的關係,以驗證本研究提出之理論架構,並進行架構之修正。結果發現如:(1)在一般工作及閱讀需求下,即使演色性不高,白光LED燈具的接受度亦不低,(2)並且以光源色溫5000~5700K,相較於低色溫光源的LED燈具對人有較多生理刺激。
At the premises of energy conservation concerns, it becomes a common place for the mass to adopt LED lighting products. That is, it is inevitable for LED lamps to replace that lit by tungsten bulbs and fluorescent tubes with its long-term life cycle, and high energy efficiency. Even though, there is no telling whether such a light source is advantageous or harmful to mankind. This deserves in-depth exploration. To take on such an exploration, T-bar LED troffers are collected and measured in terms of photometric and colorimetric parameters for further comparison. Meanwhile, related literature is scrutinized to establish potential theories and factors pertinent to the causal effects of human exposure to LED light beams. To examine if these theories hold true, a mock-up office ambiance is erected within a temperature controlled lab. In which, 26 workstations are lit by LED troffers with different attributes. The data analyses reveals a series of test results, e.g., despite its low color rendering capacity, white light LED troffers are acceptable to most respondents, and LED light sources with bluish light beams, i.e., higher CCTS, tend to evoke higher alertness that that of lower CCTs.