The “PIU” lamp is tailored to the continuous changes in office structure. By clamping the lamp between the ceiling and floor, the room itself becomes a functional support. It gives the lamp stability and serves as a reflector for the indirect lighting. The electricity supply is provided via a free-hanging cable running just beneath the ceiling. This allows the lamp to be positioned in a room independently of the existing electrical connections. A number of lamps can be joined together to form a sequence, enabling multiple workspaces and entire offices to be illuminated. “PIU” delivers light and power to the place desired.