A reflector lamp (10, 20, 1000) comprising: a light source (11, 21) for generating a light beam, and a lens (14, 44, 1001) arranged coaxially with and being spaced apart from the light source (11, 21), wherein the lens (14, 44, 1001) is a Total Internal Reflection lens, wherein the reflector lamp (10, 20, 1000) further comprises a push-push adjustment assembly (100, 200, 300, 400) for varying a beam angle of the light beam in a push manner, the push-push adjustment assembly (100, 200, 300, 400) comprising: a frame (101, 201, 301, 401) coupled fixedly to the lamp; an actuator (102, 202, 302, 402) in operative connection with the lens (14, 44, 1001), wherein the actuator (102, 202, 302, 402) movably rests in the frame (101, 201, 301, 401) so that the movement of the actuator (102, 202, 302, 402) enables the lens (14, 44, 1001) to slide relative to the light source (11, 21) thereby to provide variable axial spacing between the lens (14, 44, 1001) and the light source (11, 21) such that in a first position the lens (14, 44, 1001) provides an original beam angle and in a second position the lens (14, 44, 1001) provides a different beam angle, wherein the beam angle is increased if the lens (14, 44, 1001) is moved along an axial centre line (13, 43) towards the light source (11, 21); and a push-push latch mechanism coupled to the actuator (102, 202, 302, 402) and/or the frame (101, 201, 301, 401) to move and to latch the actuator (102, 202, 302, 402) in the frame (101, 201, 301, 401). a light source (11, 21) for generating a light beam, and a lens (14, 44, 1001) arranged coaxially with and being spaced apart from the light source (11, 21), wherein the lens (14, 44, 1001) is a Total Internal Reflection lens, wherein the reflector lamp (10, 20, 1000) further comprises a push-push adjustment assembly (100, 200, 300, 400) for varying a beam angle of the light beam in a push manner, the push-push adjustment assembly (100, 200, 300, 400) comprising: a frame (101, 201, 301, 401) coupled fixedly to the lamp; an actuator (102, 202, 302, 402) in operative connection with the lens (14, 44, 1001), wherein the actuator (102, 202, 302, 402) movably rests in the frame (101, 201, 301, 401) so that the movement of the actuator (102, 202, 302, 402) enables the lens (14, 44, 1001) to slide relative to the light source (11, 21) thereby to provide variable axial spacing between the lens (14, 44, 1001) and the light source (11, 21) such that in a first position the lens (14, 44, 1001) provides an original beam angle and in a second position the lens (14, 44, 1001) provides a different beam angle, wherein the beam angle is increased if the lens (14, 44, 1001) is moved along an axial centre line (13, 43) towards the light source (11, 21); and a push-push latch mechanism coupled to the actuator (102, 202, 302, 402) and/or the frame (101, 201, 301, 401) to move and to latch the actuator (102, 202, 302, 402) in the frame (101, 201, 301, 401). a frame (101, 201, 301, 401) coupled fixedly to the lamp; an actuator (102, 202, 302, 402) in operative connection with the lens (14, 44, 1001), wherein the actuator (102, 202, 302, 402) movably rests in the frame (101, 201, 301, 401) so that the movement of the actuator (102, 202, 302, 402) enables the lens (14, 44, 1001) to slide relative to the light source (11, 21) thereby to provide variable axial spacing between the lens (14, 44, 1001) and the light source (11, 21) such that in a first position the lens (14, 44, 1001) provides an original beam angle and in a second position the lens (14, 44, 1001) provides a different beam angle, wherein the beam angle is increased if the lens (14, 44, 1001) is moved along an axial centre line (13, 43) towards the light source (11, 21); and a push-push latch mechanism coupled to the actuator (102, 202, 302, 402) and/or the frame (101, 201, 301, 401) to move and to latch the actuator (102, 202, 302, 402) in the frame (101, 201, 301, 401).