interior fit-out(зданий; The installation of ceilings, floors, furnishings, and partitions of a building, as well as the installation of all required building services MingNa)
borrowed light(получающее свет от другого окна; light which is gained from a window inside a building, usually into a passageway, which allows light to be "borrowed" from a room, hallway etc which has an external window. Alexander Demidov)
