MIL-DTL-14465F
TABLE II. Upper beam candlepower values. 1/
Candlepower
Position (°)
Minimum
H-V
9000
H 3L to 3R
7500
1D 6L to 6R
5000
2D 6L to 6R
5000
1/ See 6.6.
3.4.3 Blackout marker light. When supplied with an input of 28 Vdc, the blackout
marker light shall meet the requirements in 3.4.3.1 through 3.4.3.4 (see 4.2.4.3).
3.4.3.1 Visibility of beams. The two light beams emitted from each blackout marker
light shall be individually visible up to 18 m. Beyond 18 m the light beams shall appear as a
single point of light. The light beams shall be visible at a distance of 244 m and shall not be
visible beyond 366 m.
3.4.3.2 Visibility from above.
3.4.3.2.1 20 percent (%) downgrade. When the composite light is on a 20% downgrade,
the vertical angles of cutoff above the horizontal shall be the maximum practicable provided the
single light effect of the marker shall not be visible from above at more than 122 m above a
horizontal line extending through the blackout marker light.
3.4.3.2.2 Vertical visibility. When the composite light is level, the vertical angles of
cutoff of the marker below the horizontal shall be such as not to cast a reflection below that
which would be visible from the air at a height of more than 122 m.
3.4.3.3 Horizontal visibility. When the composite light is level, the horizontal angles of
cutoff shall be the maximum practicable but shall be not less than 60° right or left of the beam
centerline at 30.5 m.
3.4.3.4 Color of light. The color of the transmitted light shall be in accordance with the
trichromatic coefficients given in table III.
TABLE III. Trichromatic coefficients.
Thrichromatic coefficients
Color Designation
X
Y
Z
White dark
0.146
0.139
0.715
1/ The maximum deviation shall be 0.008.
3.4.4 Blackout driving light. When installed (see 6.7) and supplied with an input voltage
of 28 Vdc, the blackout driving light shall give a white light and beam that has a luminous
intensity of not less than 25 candela and not more than 50 candela when measured in the most
intense portion of the beam, 3 m from its source. Its luminous intensity shall decrease uniformly
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