Federal Aviation Regulations
Sec. 25.1397 — Color specifications.
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 0.440−0.320 y ;
x is not greater than y −0.170; and
y is not less than 0.390−0.170 x .
(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 y 0−0.010, whichever is the smaller; and
y is not greater than x +0.020 nor 0.636−0.400 x ;
Where y 0is the y coordinate of the Planckian radiator for the value of x considered.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25–27, 36 FR 12972, July 10, 1971]
NEXT: Sec. 25.1399 - Riding light.
PREVIOUS: Sec. 25.1395 - Maximum intensities in overlapping beams of forward and rear position lights.