Metallic parts for metal skylights; metallic building materials including all types of skylights, metal light tubes, metal window frames, light grids, vents, and including metallic parts and fittings therefor.

Apparatus for controlling lighting; apparatus for lighting control; computer controllers for operating lighting apparatus; computer controls for lighting apparatus; computer controls for lighting instruments; control consoles for lighting; electrical control units for lighting installations; batteries used for lightning and venting installations; programmable controls for lighting installations; remote control apparatus for lighting units; storage batteries for lighting; suspension rails (electrified) for electrical lighting fixtures; light refracting devices.