A reflector lamp including a light source, a lens or a reflector arranged coaxially with the light source in a spaced-apart fashion, and a push-push adjustment assembly for varying a beam angle of the light beam in a push manner. The push-push adjustment assembly includes a frame coupled fixedly to the lamp, an actuator in operative connection with the lens or the reflector, wherein the actuator movably rests in the frame so that the movement of the actuator enables the lens or the reflector to slide relative to the light source thereby to provide variable axial spacing between the lens or the reflector and the light source, and a push-push latch mechanism coupled to the actuator and/or the frame to move the actuator in the frame in a push manner, and to latch the actuator in different latching positions of the frame.