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3G Vibration Test

Luminaire Vibration Test
The luminaire vibration test is designed to determine whether the luminaire is able to withstand vibrationconditions that may be encountered in normal installations. The test is a mechanical performance evaluation. Therefore, the luminaire is not normally energized d uring the test. A lamp shall be installed in the luminaire for this test. The test criteria were developed with consideration to the effect of wind and traffic induced vibration.


The luminaire shall be attached as it would be mounted in the field to a vibration table capable of withstanding the loads and forces encountered during the test and tested in a manner to simulate a normal installation.

The luminaire shall be vibrated at or near fundamental resonant frequency. This frequency shall be determined for each of the three mutually perpendicular planes (x, y, and z) and should be between 2 and 30 hertz. The acceleration intensity measured at the luminaire’s center of gravity shall be as specified in the corresponding levels as shown below. Level 1 should be used for normal roadway applications. Level 2 should be used for bridge and overpass applications. If the luminaire housing utilizes several different materials in its construction, the worst case criteria from the tables shall be used in the testing. During the vibration test, the frequency and displacement should be monitored. A major change in frequency or displacement is an indication of structural failure. The luminaire shall be capable of withstanding the described vibration for 100,000 cycles in each plane. A separate sample luminaire may be used for each plane to eliminate the effect of conjunctive material fatigue. Other test amplitudes and durations may be negotiated between the specifier and supplier as needed to simulate extreme fatigue. At the test conclusion, the luminaire shall meet its original specification. There shall be no damage to the enclosure, reduction of electrical spacings, or loosening of any part of the luminaire. If the light source is integral to the luminaire, it shall be fully operational at test completion.
Vibration Test Level 1—Normal Applications
All materials shall be 1.5 G (14.67 m/s2)
Vibration Test Level 2—Bridge/Overpass Applications
All materials shall be 3.0 G (29.4 m/s2)

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