An illumination apparatus for use in an endoscope, the endoscope having a distal end, and at least a first illumination window and a second illumination window disposed at the distal end of the endoscope, the illumination apparatus comprising: at least a first semiconductor light source and a second semiconductor light source; and at least a first fiber bundle and a second fiber bundle, the first fiber bundle having a first plurality of optical fibers segregated to form at least a first fiber sub-bundle and a second fiber sub-bundle, the second fiber bundle having a second plurality of optical fibers segregated to form at least a third fiber sub-bundle and a fourth fiber sub-bundle, wherein each of the first fiber sub-bundle, the second fiber sub-bundle, the third fiber sub-bundle, and the fourth fiber sub-bundle has a distal end and a proximal end, wherein the proximal end of each of the first fiber sub-bundle and the second fiber sub-bundle is configured to receive light emitted by at least the first semiconductor light source, wherein the proximal end of each of the third fiber sub-bundle and the fourth fiber sub-bundle is configured to receive light emitted by at least the second semiconductor light source, wherein the respective distal ends of the first fiber sub-bundle and the second fiber sub-bundle are configured to direct the light emitted by the first semiconductor light source to the first illumination window and the second illumination window, respectively, at the distal end of the endoscope, and wherein the respective distal ends of the third fiber sub-bundle and the fourth fiber sub-bundle are configured to direct the light emitted by the second semiconductor light source to the first illumination window and the second illumination window, respectively, at the distal end of the endoscope. at least a first semiconductor light source and a second semiconductor light source; and at least a first fiber bundle and a second fiber bundle, the first fiber bundle having a first plurality of optical fibers segregated to form at least a first fiber sub-bundle and a second fiber sub-bundle, the second fiber bundle having a second plurality of optical fibers segregated to form at least a third fiber sub-bundle and a fourth fiber sub-bundle, wherein each of the first fiber sub-bundle, the second fiber sub-bundle, the third fiber sub-bundle, and the fourth fiber sub-bundle has a distal end and a proximal end, wherein the proximal end of each of the first fiber sub-bundle and the second fiber sub-bundle is configured to receive light emitted by at least the first semiconductor light source, wherein the proximal end of each of the third fiber sub-bundle and the fourth fiber sub-bundle is configured to receive light emitted by at least the second semiconductor light source, wherein the respective distal ends of the first fiber sub-bundle and the second fiber sub-bundle are configured to direct the light emitted by the first semiconductor light source to the first illumination window and the second illumination window, respectively, at the distal end of the endoscope, and wherein the respective distal ends of the third fiber sub-bundle and the fourth fiber sub-bundle are configured to direct the light emitted by the second semiconductor light source to the first illumination window and the second illumination window, respectively, at the distal end of the endoscope.