SPECIFICATION FOR TESTING AUTOMOTIVE MINIATURE BULBS(STABILIZED Mar 2022) USCAR3-4

The procedures contained in this specification cover the laboratory testing of miniature incandescent bulbs for use in automotive illumination and signaling applications. The following tests shall be run whenever the following occurs:

New bulb design
Design or process change made to an existing bulb, which could affect the outcome of the test.

The completion of one calendar year as noted in the following Test Schedule Table. Process control data is acceptable.

Test Title	Yearly
Physical Dimensions	X
Mean Spherical Candela	X
External Visual Examination	X
Crush	X
Thermal Shock	X
Bayonet Base Retention	X
Pin Removal	X
Wedge Base Retention	X
Lead Wire Bend	X
Lead Wire Pull	X
Natural Amber Color	X
Coated Amber Color Integrated Color Visual Color Point Color Color Maintenance and Coating Durability Amber Coating Chemical Resistance	X X X
Resonant Frequency
Aged Resonant Frequency
Salt Spray
Wire Loop Pull	X
Outgassing/Heat
Laboratory Life
Accelerated Life	X
Luminous Intensity Maintenance	X
Vibration Durability
Shock
Aged Vibration Durability