Mixed mode vibration test for luminaires devices: A new proposal

Luminaires for outdoor use are subject to a great number of environmental agents that can generate stress conditions on the device and affect their reliability performance. Typical examples of environmental factors are temperature, rain, humidity, solar radiation, vibrations, etc., or a combination of these. The aim of this work focuses on vibration stress to which a luminaire can be subject in its final application in order to test for its weaknesses and prevent failures. Starting from a detailed study of Standards concerning luminaires, vibration tests has been noted that the test profiles are either sinusoidal or random type. On the contrary, in the literature is stated that the luminaires, in their final application, may be subject to both types of vibration. For this reason a new test profile applicable to luminaires for outdoor use, based on mixed mode vibration, has been proposed. The aims is to establish vibration levels that depend on the final installation of the device and optimize cost-saving for the test.