F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F21
LIGHTING
F21
LIGHTING
F21S
NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
F21S
NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
F21S8/00
Lighting devices intended for fixed installation
F21S8/00
Lighting devices intended for fixed installation
F21S8/02
of recess-mounted type, e.g. downlighters
F21S8/02
of recess-mounted type, e.g. downlighters
F21S8/026
intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
F21S8/026
intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling