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

3.7 Operating environment requirements. Each light assembly shall operate under the

following environmental conditions, without degradation in performance.

3.7.1 Temperature cycling. The light assembly shall withstand exposure to temperatures

as high as 85 degrees Celsius (�C) and as low as -55�C and to the thermoshock of alternate

exposures to these extremes (4.2.7.1).

3.7.2 Waterproofness. The light assembly shall evidence no leakage, operational or

mechanical damage during and after total submersion in a saline solution while supplied with 28

Vdc (4.2.7.2).

3.7.3 Vibration resistance. The light assembly shall be capable of withstanding the

vibration profile experienced in the variety of military tactical vehicles in which it is used

(see 4.2.7.3).

3.7.4 Shock resistance. The light assembly shall be capable of withstanding the

sawtooth wave shock pulses having a peak value of 30 gravity units (g) and a duration of 11

milliseconds (ms) (see 4.2.7.4).

3.7.5 Fungus resistance. The light assembly shall be resistant to conditions favorable to

fungal growth; during 28-30 degrees Celsius (�C) and not less than 85% relative humidity

(see 4.2.7.5).

3.7.6 Corrosion resistance. The light assembly shall be resistant to salt spray (fog) with

6.5-7.2 pH at 350C (see 4.2.7.6).

4. VERIFICATION

4.1 Classification of inspection. The inspection conditions specified herein are classified

as follows:

a. First article inspection.

b. Conformance Inspection (CI).

4.1.1 First article inspection. When specified (see 6.2), first article inspection shall be

performed on four initial production light assemblies as specified herein. Approval of the first

production units by the Government shall not relieve the contractor of the obligation to supply

assemblies that are fully representative of those inspected as a first article (see 6.4). First article

inspection shall consist of the examinations and tests as specified in table V.

4.1.1.1 Order of inspection. The first article inspection sequence shall be in the order

listed in table VI.

4.1.2 Conformance inspection. Unless otherwise specified (see 6.2), conformance

inspection shall include the examinations and tests specified in table V (see 6.5).