An assembled lamp (10, 101, 102, 103), comprising at least two lamp units sequentially connected, wherein each of the at least two lamp units has a plurality of side walls, a first conductive terminal is arranged on at least one of the plurality of side walls, a row hole corresponding to the first conductive terminal is disposed on other side walls of the plurality of side walls, and a second conductive terminal is arranged in the row hole; a power supply bus, a light source device and a processor which are connected with the power supply bus, and a communication bus connected with the processor are arranged inside each of the at least two lamp units, and each of the power supply bus and the communication bus is connected with the first conductive terminal and the second conductive terminal of the lamp unit; in the assembled lamp (10, 101, 102, 103), two adjacent lamp units respectively are a first lamp unit and a second lamp unit, wherein the first conductive terminal of the first lamp unit is inserted into the row hole of the second lamp unit and connected with the second conductive terminal in the row hole so as to implement electrical connection and communication connection between the two adjacent lamp units; the power supply bus of the first lamp unit is adapted to receive an external voltage signal, adapted to supply power to the processor and the light source device of the first lamp unit, and is adapted to transmit the external voltage signal to the power supply bus of the second lamp unit via the conductive terminal in inserted connection with the first lamp unit; and the communication bus of the first lamp unit is adapted to receive a control signal from an external main controller, and adapted to transmit the control signal onto the communication bus of the second lamp unit via the conductive terminal in inserted connection with the first lamp unit, and characterized in that a guide member is also arranged on a side wall where the first conductive terminal of each of the at least two lamp units is positioned, and a guide groove corresponding to the guide member is also disposed on a side wall of the at least two lamp units where the row hole is disposed; and in the two adjacent lamp units, the guide member of the first lamp unit is in inserted connection into the guide groove of the second lamp unit, and an opening diameter of the guide groove is smaller than a groove internal diameter of the guide groove. each of the at least two lamp units has a plurality of side walls, a first conductive terminal is arranged on at least one of the plurality of side walls, a row hole corresponding to the first conductive terminal is disposed on other side walls of the plurality of side walls, and a second conductive terminal is arranged in the row hole; a power supply bus, a light source device and a processor which are connected with the power supply bus, and a communication bus connected with the processor are arranged inside each of the at least two lamp units, and each of the power supply bus and the communication bus is connected with the first conductive terminal and the second conductive terminal of the lamp unit; in the assembled lamp (10, 101, 102, 103), two adjacent lamp units respectively are a first lamp unit and a second lamp unit, wherein the first conductive terminal of the first lamp unit is inserted into the row hole of the second lamp unit and connected with the second conductive terminal in the row hole so as to implement electrical connection and communication connection between the two adjacent lamp units; the power supply bus of the first lamp unit is adapted to receive an external voltage signal, adapted to supply power to the processor and the light source device of the first lamp unit, and is adapted to transmit the external voltage signal to the power supply bus of the second lamp unit via the conductive terminal in inserted connection with the first lamp unit; and the communication bus of the first lamp unit is adapted to receive a control signal from an external main controller, and adapted to transmit the control signal onto the communication bus of the second lamp unit via the conductive terminal in inserted connection with the first lamp unit, and characterized in that a guide member is also arranged on a side wall where the first conductive terminal of each of the at least two lamp units is positioned, and a guide groove corresponding to the guide member is also disposed on a side wall of the at least two lamp units where the row hole is disposed; and in the two adjacent lamp units, the guide member of the first lamp unit is in inserted connection into the guide groove of the second lamp unit, and an opening diameter of the guide groove is smaller than a groove internal diameter of the guide groove.