A lamp, comprising two splicing structures and two connecting sides facing away from each other, and each of the two connecting sides is provided with one of the two splicing structures, wherein each splicing structure comprises a first clamping groove and a second clamping groove extending in a same direction, and a notch of the first clamping groove and a notch of the second clamping groove face in opposite directions, wherein each of the first clamping groove and the second clamping groove faces in a direction perpendicular to a direction in which the connecting side faces, wherein each splicing structure further has a third clamping groove extending in a direction the same as that of the first clamping groove, the third clamping groove is located at a side of the first clamping groove away from the second clamping groove, and a notch of the third clamping groove faces the notch of the first clamping groove, wherein one end of the first clamping groove and one end of the third clamping groove extend to a same edge of the lamp and form a first insertion opening (10a1) and a third insertion opening (10c1) at the edge, respectively; the lamp further comprises a bracket and a bracket connecting module, the bracket connecting module is in sliding connection with the first clamping groove and the third clamping groove of one of the two splicing structures and the bracket connecting module is connected to the bracket, characterized in that the bracket connecting module comprises a first bracket connector and a second bracket connector, the first bracket connector is capable of simultaneously sliding into the first clamping groove and the third clamping groove through the first insertion opening (10a1) and the third insertion opening (10c1) and sliding along the first clamping groove and the third clamping groove, and the second bracket connector is located outside the first clamping groove and the third clamping groove and connected to the first bracket connector. wherein each of the first clamping groove and the second clamping groove faces in a direction perpendicular to a direction in which the connecting side faces, wherein each splicing structure further has a third clamping groove extending in a direction the same as that of the first clamping groove, the third clamping groove is located at a side of the first clamping groove away from the second clamping groove, and a notch of the third clamping groove faces the notch of the first clamping groove, wherein one end of the first clamping groove and one end of the third clamping groove extend to a same edge of the lamp and form a first insertion opening (10a1) and a third insertion opening (10c1) at the edge, respectively; the lamp further comprises a bracket and a bracket connecting module, the bracket connecting module is in sliding connection with the first clamping groove and the third clamping groove of one of the two splicing structures and the bracket connecting module is connected to the bracket, characterized in that the bracket connecting module comprises a first bracket connector and a second bracket connector, the first bracket connector is capable of simultaneously sliding into the first clamping groove and the third clamping groove through the first insertion opening (10a1) and the third insertion opening (10c1) and sliding along the first clamping groove and the third clamping groove, and the second bracket connector is located outside the first clamping groove and the third clamping groove and connected to the first bracket connector.