MIL-STD-1179 Lamps, Reflectors And Associated Signaling Equipment For Military VehiclesThis standard applies to all military combat, special purpose and tactical transport vehicles, both tracked and wheeled. Administrative and commercial vehicles are not within the scope of this standard, since total compliance with Motor Vehicle Safety Standard MVSS No. 108 is required for these vehicles. Infrared secure lighting photometric requirements apply to new military vehicles starting with serial number 1 manufactured after September 1, 1988. Retrofit, rebuild, or other modifications of military vehicles built before September 1, 1988 will conform to Secure Lighting Requirements upon determination of need and discretionary judgment by the appropriate modifying Government agent.

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MIL-STD-1179E

4.4.4 Headlamp, upper and lower beam switch. Each vehicle shall be equipped with a means of switching between upper and lower headlamp beams, conforming to SAE J564 or SAE J565. Each vehicle shall be equipped with a means of indicating to the driver when the upper beams are on, conforming to SAE J564, except for signal color.

4.5 General blackout lighting requirements. No service lamp shall be capable of being activated while the vehicle's light switch (MIL-PRF-11021) is in blackout marker, blackout drive or off position.

4.5.1 Vehicle secure blackout lights and location. The minimum number of secure blackout lights on a military vehicle shall be as specified in table VI.

4.5.2 Secure blackout marker lamps. As referenced in table VI, the secure blackout marker lamps shall meet the requirements specified in 4.5.2.1 through 4.5.2.4.

4.5.2.1 Visibility of beams. The front position marker filter lens shall be opaque except for two Y-shaped openings which shall emit yellow-white light. The two openings of each blackout marker lamp shall be individually visible up to 60 feet. Beyond 60 feet the opening shall appear as a single point of light.

4.5.2.2 Visibility from air.

a. Vehicle on 20 percent upgrade. When vehicle is on a 20 percent upgrade, the vertical angles of cutoff above the horizontal shall he the maximum practicable provided the single light effect of the front marker shall not be visible from the air at more than 400 feet above a horizontal line extended through the secure

blackout marker lamp.

b. Vehicle on level road. When vehicle is on a level road, the vertical angles of cutoff of the marker below the horizontal shall be such as not to cast a reflection on the road that would be visible from the air at a height of more than 400 feet.

4.5.2.3 Horizontal visibility on road. When the vehicle is on a level road, the horizontal angles of cutoff shall be the maximum practicable, but shall be not less than 60 degrees right or left of the beam centerline at 100 feet.

4.5.2.4 Color of visible light. Color values of the transmitted visible light shall be in accordance with trichromatic coefficients specified in component drawings.

4.5.2.5 Secure blackout lighting. Secure blackout lighting is the restriction of blackout mode light sources spectral emissions. Light sources that can or do emit light during blackout mode of operation shall be restricted to the visible portion of the electromagnetic spectrum between 380 and 700 nanometers. Peak emission in the infrared 700 to 1200 nanometer region shall be restricted to less than ten percent relative to that measured in the visible region (380 to

700 nanometers) for any given secure blackout light source.