A white light source (100, 200, 300, 400), comprising: a first light source adapted to emit first light; a reflecting wavelength converting element arranged to receive first light from the first light source and at least partly convert it to converted light; and a second light source adapted to emit blue light which in use combines with the converted light to generate white light; characterized in that the white light source further comprises a beam shaping element adapted to adjust the intensity profile of the blue light emitted by the second light source to match the intensity profile of the converted light, and in that the white light source further comprises: an optical element (106, 206) adapted to re-direct first light and blue light, and transmit converted light; and a light exit device, wherein the beam shaping element is arranged in an optical path between the second light source and the optical element, and wherein the white light source is arranged so that in use the first light emitted by the first light source is re-directed by the optical element to the reflecting wavelength converting element, the converted light is transmitted through the optical element to the light exit device, and the blue light emitted by the second light source is re-directed by the optical element to the light exit device, wherein the optical element is sized so that blue light from the reflecting wavelength converting element is blocked by the optical element from reaching the light exit device. a first light source adapted to emit first light; a reflecting wavelength converting element arranged to receive first light from the first light source and at least partly convert it to converted light; and a second light source adapted to emit blue light which in use combines with the converted light to generate white light; characterized in that the white light source further comprises a beam shaping element adapted to adjust the intensity profile of the blue light emitted by the second light source to match the intensity profile of the converted light, and in that the white light source further comprises: an optical element (106, 206) adapted to re-direct first light and blue light, and transmit converted light; and a light exit device, wherein the beam shaping element is arranged in an optical path between the second light source and the optical element, and wherein the white light source is arranged so that in use the first light emitted by the first light source is re-directed by the optical element to the reflecting wavelength converting element, the converted light is transmitted through the optical element to the light exit device, and the blue light emitted by the second light source is re-directed by the optical element to the light exit device, wherein the optical element is sized so that blue light from the reflecting wavelength converting element is blocked by the optical element from reaching the light exit device. an optical element (106, 206) adapted to re-direct first light and blue light, and transmit converted light; and a light exit device, wherein the beam shaping element is arranged in an optical path between the second light source and the optical element, and wherein the white light source is arranged so that in use the first light emitted by the first light source is re-directed by the optical element to the reflecting wavelength converting element, the converted light is transmitted through the optical element to the light exit device, and the blue light emitted by the second light source is re-directed by the optical element to the light exit device, wherein the optical element is sized so that blue light from the reflecting wavelength converting element is blocked by the optical element from reaching the light exit device.