太陽光是一種不同波長的連續光譜。分為可見光與不可見光。人眼可以感受到的波長範圍一般是落在360 - 400 nm ~ 760 - 830nm，牛頓把光譜分成7種顏色：紅、橙、黃、綠、藍、靛、紫。穿過大氣層看起來則為白光。不可見光，又分為2種：位於紅光之外區的叫紅外線，波長大於760nm - 830nm；位於紫光之外區的叫紫外線，波長小於360～400nm。
然而，發光二極體(LED)本身是單色光源，所以LED不容易完全達到如自然光的效果。一般市售的LED光源為固定光譜的組合而產生單一光色。白光發光二極體是透過發出三源色的單色光（藍、綠、紅）或以螢光劑把發光二極體發出的單色光轉化為含有三源色的光譜，刺激人眼感光細胞，使人有看見白光的感覺。為了改善上述LED的缺點，透過調整特定光譜範圍的白光、紅光、藍光、綠光，讓LED產生接近自然光的色溫與演色性變得可能，仿生自然光的技術於是應運而生。
仿生自然光的技術包括4-color in one COB、混光專用的光學機構、multi-channel調光等技術，讓單一LED燈具即能產生有如日出日落的太陽光色。色溫可從1650K~10000K，演色性指數可達98。寬色溫與高演色性指數的光源非常適合應用於攝影白平衡、拍攝補光的場合，讓照片與畫面更顯真實。
晝夜循環
有了仿生自然光的技術，再結合時間控制，模擬日出日落的日光時間就變得容易許多。加上燭光的光色，可以依照作息時間，調配出晝夜循環的光源，作為室內照明、藝術品打光、盆栽植物生長等用途，營造多變的居家氣氛。
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