The present invention proposes a semiconductor light-emitting device having an axis of symmetry, the device including two or more laser diodes, each of the laser diodes has an axis of symmetry, wherein the laser diodes are arranged in series on the axis of symmetry of the light-emitting device in such a way that their axes of symmetry coincide, wherein faces of the laser diodes are connected so that they are in electric and mechanic contact and form a bar of the laser diodes, a directional pattern of radiation thereof has an axis of symmetry coinciding with the axis of symmetry of the light-emitting device. The proposed light-emitting device can be used in laser lamps of white light for exciting phosphors since it provides a high degree of flare of cylindrical surfaces.