A light delivery apparatus includes a housing, an optical comb coupled to the housing, and at least one light source inside the housing. The optical comb includes a platform and an array of solid light guides extending from the platform. The optical comb includes an input surface and an exit surface. Substantially all light emitted by the light guides exits from the exit surfaces when in operation as provided by a reflective coating on each of the four or more light guides, as provided by a geometric shape of each of the four or more light guides, or both. The at least one light source is positioned to irradiate the input surfaces when the at least one light source is energized. Also, the at least one light source includes at least one light-emitting diode (LED) unit or at least one laser diode.
