Lamp power supply box and lamp using same

Compared with the prior art, one side of the lamp power supply box is rotatably connected, the other side of the lamp power supply box is fixedly connected with a lower cover through an elastic piece to form a clamping portion, and the clamping portion is provided with a clamping opening allowing a protruding end to enter or exit so that the clamping portion can be clamped with or separated from the protruding end of an upper cover. Under the condition that one side is rotatable, the upper cover and the lower cover on the other side can be conveniently and accurately opened and closed in a more labor-saving mode, meanwhile, high-altitude operation can be conveniently carried out, on the other hand, the elastic pieces can adopt different specifications and shapes to be matched with protruding ends of different specifications and shapes, and universality is high; moreover, when the elastic sheet is damaged, the whole rear cover does not need to be replaced, only the elastic sheet needs to be replaced, and the m