Each position light color must have the applicable International Commission on Illumination chromaticity coordinates as follows:
(a) Aviation red --
y is not greater than 0.335; and
z is not greater than 0.002.
(b) Aviation green --
x is not greater than 0.440−0.320y;
x is not greater than y−0.170; and
y is not less than 0.390−0.170x.
(c) Aviation white --
x is not less than 0.300 and not greater than 0.540;
y is not less than x−0.040 or y0−0.010, whichever is the smaller; and
y is not greater than x+0.020 nor 0.636−0.400x;
Where y0 is the y coordinate of the Planckian radiator for the value of x considered.
[Doc. No. 4080, 29 FR 17955, Dec. 18, 1964, amended by Amdt. 23-11, 36 FR 12971, July 10, 1971]
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