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太籠統(tǒng)了，白色對(duì)應(yīng)了很多色坐標(biāo)，而自然發(fā)光體中是沒有黑色的。色坐標(biāo)和光通量，光強(qiáng)無關(guān)

tianny99:Based on the white color-coordinate(x,y), we can obtain a factor of n firstly, eyx;8v cM  
    n=(x-0.3320)/(0.1858-y), Tug}P K   
then, we can calculate CCT(Correlated Color Temperature) as following, QasUgZ  
    CCT=437*n^3+3601*n^2+6831*n+5517 (2008-07-22 16:05)  '+!@c&d#%o  

T8ga)BA  
6500的色溫X=313 Y=328 (sngq{*%%z  
kt.y"^  
公式 -437*{（313-0.332)/(328 -0.1858)}*{（313-0.332)/(328 -0.1858)}*{（313-0.332)/(328 -0.1858)}+3601*{（313-0.332)/(328 -0.1858)}*{（313-0.332)/(328 -0.1858)}-6861*{（313-0.332)/(328 -0.1858)}+5514.31 ~~~~6500 rUb`_