定義白光LED的顏色特性

　　顏色相關的溫度（CCT）的光被定義為“對普朗克輻射體的感知顏色最接近的一個給定的刺激在同一亮度在特定的觀察條件下的溫度。”

　　這是工程師的一個有用的定義，并幫助他們對白光LED的輸出為“冷白這樣的分組下，“中性白色”和“暖白”。消費者是在科學的定義不感興趣，但對照明的LED供電照明用如此挑剔的國內業務，或工業廠房。

　　本文解釋了什么是CCT，并說明它是如何用于分類商業白光LED用于照明應用。最后，我們將研究固態照明制造商為什么要提供覆蓋全系列CCT光源的設備。

　　How white is white？

　　Despite their obvious benefits over traditional lighting – such as efficacy， lifetime， and compactness – LEDs have faced some resistance to adoption for consumer lighting. Although the evidence is somewhat anecdotal， detractors claim that “harshness” of the light given off by a white LED-based lighting fixture is not as pleasant to live with as the “warmth” of an incandescent bulb.

　　LED makers， keen to meet the aspiration of their customers， have worked hard to develop LEDs that more closely match the color （or “temperature”） of the illumination given out by traditional sources.