能源之星針對照明產品制定了一系列的規範，其中一項規範就是對光源的色彩品質訂定了兩個評估指標，色差以及演色指數，色差越小越好，演色指數則是越高越好。於是本論文將本實驗室所研發的多色LED模組，作為本論文的研究模型，此模型的優點在於，我們可以調整不同顏色LED的能量比，來改變光源所呈現的顏色和演色能力，所以本論文探討如何計算這些能量比，可以使色差修正以及演色指數提升，最後加入其它色彩評估指標，為我們的方法作客觀的評估。

Environmental protection is an important issue. LED lighting is a good technology for our earth since the emission efficiency is getting better and better. Many enterprises have invested in LED research. Energy star formulates two indicators to assess the color performance of lighting source: chromatic difference and color rendering index. This thesis is based on the principle of chromatics. Several valid methods to reconstruct the reference light are developed. We can derive the best color rendering index with acceptable color difference and good color rendering index with minimal color difference. The gamut area index is also used to examine the reconstructed light as an objective assessment of indicators.

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