modified spectrum
Defined in 1 place of the United States Code.
Modified spectrum.—The term "modified spectrum" means, with respect to an incandescent lamp, an incandescent lamp that—
(i) is not a colored incandescent lamp; and
(ii) when operated at the rated voltage and wattage of the incandescent lamp—
(I) has a color point with (x,y) chromaticity coordinates on the Commission Internationale de l'Eclairage (C.I.E.) 1931 chromaticity diagram that lies below the black-body locus; and
(II) has a color point with (x,y) chromaticity coordinates on the C.I.E. 1931 chromaticity diagram that lies at least 4 MacAdam steps (as referenced in IESNA LM16) distant from the color point of a clear lamp with the same filament and bulb shape, operated at the same rated voltage and wattage.
Source
- 2007–201842 U.S.C. § 6291The Public Health and Welfare · Definitions · for purposes of this part
The term “modified spectrum” means, with respect to an incandescent lamp, an incandescent lamp that—
(i) is not a colored incandescent lamp; and
(ii) when operated at the rated voltage and wattage of the incandescent lamp—
(I) has a color point with (x,y) chromaticity coordinates on the Commission Internationale de l’Eclairage (C.I.E.) 1931 chromaticity diagram that lies below the black-body locus; and
(II) has a color point with (x,y) chromaticity coordinates on the C.I.E. 1931 chromaticity diagram that lies at least 4 MacAdam steps (as referenced in IESNA LM16) distant from the color point of a clear lamp with the same filament and bulb shape, operated at the same rated voltage and wattage.
Source
- 2013–present42 U.S.C. § 6291The Public Health and Welfare · Definitions · for purposes of this part