EC-directive
An EC directive is binding for each member state it is directed to, but the member state may decide itself the form and procedure for implementation.
Wieland
Different makes and models of quick connectors can be used to simplify the installation of luminaires. The main benefit of quick connection systems is the reduction in installation times for large or continuous lighting systems. These systems allow a certain degree of flexibility, as it might be easier to move already-connected products without affecting the fixed installation.