Modified spectrum

means, with respect to an incandescent lamp, an incandescent lamp that:

(1) is not a colored incandescent lamp; and

(2) when operated at the rated voltage and wattage of the incandescent lamp -

(A) has a color point with (x,y) chromaticity coordinates on the C.I.E. 1931 chromaticity diagram, figure 2, page 3 of IESNA LM-16 that lies below the black-body locus; and

(B) has a color point with (x,y) chromaticity coordinates on the C.I.E. 1931 chromaticity diagram, figure 2, page 3 of IESNA LM-16 that lies at least 4 MacAdam steps, as referenced in IESNA LM-16, distant from the color point of a clear lamp with the same filament and bulb shape, operated at the same rated voltage and wattage.