現代人因工作忙碌，常累積許多精神壓力。長時間便造成憂鬱、失眠，甚至身體健康的問題。相關的研究指出，不同光源照明環境與照明特性會影響人體的心理與生理反應。
　　朝向節能、地球永續的環境需求與時代趨勢，以及人類追求生活品質、健康與舒適環境，已成為當今必須注意的課題。
　　本研究使用不同的LED照明環境對經由生活健康量表篩選出條件符合的健康受測者客觀地進行實驗。在不同的LED照明環境下，藉由不同種類的圖片給予受測者不同的情緒刺激並記錄其心電圖(ECG)信號，依據心電圖所產生的心率變異度(HRV)分析自律神經活性的平衡狀態，探討其情緒反應。

　　In the modern time, people are usually easy to accumulate mental stress because their busy work. As a result, they bring about melancholia or insomnia, even create some problems of health. According to previous studies, different lighting environment and lighting characteristic will affect psychological and physiological responses of human.
　　For future environmental demand and matching to trends of the times, the energy saving, earth sustainability, the quality of life, health and comfortable environments have already become the most important issues now.
　　In this study, we use different LED sources as the experimental lighting environment. The experimented subjects are healthy people which are selected by Life Health Questionnaire (SF-36). Under different LED lighting environments, we use the different kind of pictures to alter the emotions of the subjects and record their ECG signals. By using HRV analysis based on ECG, we can analyze the balance of autonomic nervous activity and discuss their emotional responses under different LED lighting environments.

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