A LED lamp includes a driving member including a driving power, a controlling member including a PCB electrically connected to the driving power, and a light-emitting member. The light-emitting member includes a plurality of light plates having a plurality of light-emitting elements electrically connected to the PCB, and a plurality of reflecting portions. Each of the reflecting portions includes a pair of supporting beams and a plurality of staircase elements straddling the supporting beams. Each of the staircase elements includes a first face connected to one of the supporting beam, a second face connected to another supporting beam, and a third face connecting the first face and the second face. Each of the reflecting portions is mounted to a corresponding light plate and covers the light-emitting elements of the corresponding light plate.