Patent ID: 8551683

Claim:
In combination, a light source and a subject, wherein the light source has an a illumination spectrum characterized by a distinctively stronger narrow band emission peak that has a full-width at half maximum of 10 to 30 nm at a predetermined wavelength within a spectrum compared to other wavelengths; and, the subject has a pigment applied thereto, wherein the pigment has a reflection spectrum characterized by one of a distinctively stronger reflection peak at the predetermined wavelength compared to said other wavelengths and a distinctively weaker reflection gap at the predetermined wavelength compared to said other wavelengths; wherein the pigment gives the subject a distinct appearance when illuminated by the light source, due to a color shift from the emission peak matching one of the reflection peak and the reflection gap, as compared to a nominal appearance when illuminated by an alternate light source which does not include the distinctively stronger emission peak at the predetermined wavelength as compared to said other wavelengths.