In 1991, the company was restructured and two divisions were established: Lighting Solutions (then Zumtobel Licht) and Lighting Components (then Tridonic-Bauelemente). In 1993, Zumtobel acquired a majority stake in the German Staff Group in Lemgo; the remaining shares were taken over in 1994. In 2000, the British company "Wassall plc" was acquired with the assistance of the American equity capital partner Kohlberg Kravis Roberts & Co. (KKR), and the Thorn Lighting Group was merged with Zumtobel’s luminaire business; the components business of Thorn was transferred to the Tridonic Division.