F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F21 LIGHTING
F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
21/00 Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
F21V21/34 Supporting elements displaceable along a guiding element