F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V23/00—Arrangement of electric circuit elements in or on lighting devices
F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
An automatic system for detecting printing faults on metallised strips or any other printing support comprising a predominance of specular colour surfaces