In evaluating whiteness of light from a light source or a luminaire, whiteness W is given by the following equation, W=-5.3C+100, wherein chroma C is determined by the CIE 1997 Interim Color Appearance Model (Simple Version).

 
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< Organic electroluminescent device having a thin film formed by plasma on a surface of a hole injection layer

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> Electroluminescent material containing a conjugated polymer or metal complexes inside zeolites and porous materials and the preparation method thereof

> Photo-luminescence layer in the optical spectral region and in adjacent spectral regions
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