Quality luminaires feature additional labels such as Certification labels, e.g. ENEC or VDE signs, ball-impact safety The labels must be clearly legible, permanently affixed to the luminaire and clearly identifiable during installation and, for the most significant ones, also during maintenance. The manufacturer assumes product liability for operation according to the information stated on the luminaire’s type plate and in its installation instructions. Test performed by independent testing institutions (e.g. for ENEC certification) concern this information (see chapter "Safety symbols for luminaires"). In case of operation outside of documented conditions, all certification symbols lose their validity and product liability expires. Particularly regarding use of retrofit light sources, the light source provider assumes liability for safety and error-free luminaire and light source functionality within the permissible use according to the light source’s documentation. The permissibility of use must be assessed on an individual basis by the retrofitting person.
