MIL-DTL-14465 Lights, Composite, 24 Volts Direct Current \(Nominal\) VehicularThis specification covers two types of vehicular composite light assemblies each consisting of a service driving light, infrared driving light, blackout driving light, and a blackout marker light. The vehicular composite light assemblies are referred to herein as "light assemblies". The light assemblies are designed for use on military tracked vehicles equipped with nominal 24-volt \(V\) direct current \(dc\) electrical systems \(see 6.1\).

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MIL-DTL-14465F

4.2.3 Materials, design and construction. Conformance to 3.2 through 3.3.9 shall be

determined by inspection of contractor records providing proof or certification that design,

construction, processing, and materials conform to requirements. Visual verification that the

required components specified herein are not used shall constitute failure of this test (see 4.2).

4.2.4 Operating requirements verification.

4.2.4.1 Functioning. To determine conformance to 3.4.1, the composite light assembly

shall be installed in a suitable holder, connected to a 28 Vdc power source, and then visually

examined.

4.2.4.2 Sealed-beam lamps - candle power. To determine conformance to 3.4.2, the

sealed-beam lamps shall be tested in accordance with the photometry test method specified in

SAE J575. The photometry tests shall be made at the design voltage (28 Vdc) of the sealed-

beam unit and with a photometer located at a distance 18 m from the lamp.

4.2.4.3 Blackout marker light. To determine conformance to 3.4.3, the blackout marker

shall be connected to a 28 Vdc power source and tested by any practical method to determine

visibility specified in 3.4.3. The trichromatic coefficients shall be determined at the design

voltage (28 Vdc) of the blackout marker light in accordance with SAE J578.

4.2.4.4 Blackout driving light. To determine conformance to 3.4.4, the blackout driving

light shall be connected to a 28 Vdc power source and tested in accordance with the photometry

test method specified in SAE J575.

4.2.5 Interface requirements verification.

4.2.5.1 Interchangeability. To determine conformance to 3.5.1, verify the

interchangeability between different parts having the same military part number by a sample test

of replacing one part for another of the same part number. External dimensions, electrical

connectors, mounting dimensions and locations that do not conform to applicable drawings shall

constitute failure of the test (see 4.2).

4.2.6 Support and ownership requirements verification.

4.2.6.1 Identification marking. Verify the presence of the minimum required

identification markings of 3.6.1. Absence of any of the minimum markings constitutes failure of

this test (see 4.2).

4.2.6.2 Safety. To determine conformance to 3.6.2, the light assembly shall be inspected

for hazardous burrs, sharp edges, foreign materials, or other imperfections that pose physical

danger to an installer/operator. Inspect the assembly for exposed, frayed, unsecured, or

otherwise improperly protected circuits that pose electrical danger to the installer/operator.

Existence of any of these imperfections shall constitute failure of this test (see 4.2).