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Here is a method besed on CIE1931 system: {n2mh%I
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1) Try to find the intersection point of CIE1931 standrad curve and the following line: CTv-$7#
y=k*(x-0.3333) + 0.3333 o}mD1q0yE
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k=(yo-0.3333)/(xo-0.3333) and (xo,yo) is the known color coordintae point. 2VyLt=mdh
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2) the wavelength of the intersection point will be the dominant wave to be determined. ]7}2"?J4v
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If you need further help, I can share an Excel file. 7rw}q~CE5
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Let me know how thing's going. ,YX[6eZr
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Hope helpful. {<5rbsqk
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Mang