An ophthalmic endoilluminator (100, 100a, 400) comprising: a light source having only a first monochromatic light source emitting a first light and a second monochromatic light source emitting a second light, the first and second lights defining a light color axis representable on a chromaticity graph, the light color axis defining the range of possible colors capable of being produced by mixing the light emitted from the first and second light sources; a collimation element (408, 410) configured to collimate at least one of the first and second lights; a mixing device configured to mix light emitted from the first and second lights into a single light beam; a lens configured to focus the single light beam; an optical fiber configured to carry the single light beam; and a controller coupled to the first and second monochromatic light sources (402 and 404), the controller being programmed with a control scheme that calculates the appropriate combination of wavelengths of light that need to be emitted by the first and the second monochromatic light source, respectively, such that the light color axis intersects a white region on the chromaticity graph, the controller further configured to: tune the first and second light sources by altering the intensity of the first and second light sources such that the light produced from mixing the first and second light sources represents a point on the light color axis that is located within the white region on the light color axis. a light source having only a first monochromatic light source emitting a first light and a second monochromatic light source emitting a second light, the first and second lights defining a light color axis representable on a chromaticity graph, the light color axis defining the range of possible colors capable of being produced by mixing the light emitted from the first and second light sources; a collimation element (408, 410) configured to collimate at least one of the first and second lights; a mixing device configured to mix light emitted from the first and second lights into a single light beam; a lens configured to focus the single light beam; an optical fiber configured to carry the single light beam; and a controller coupled to the first and second monochromatic light sources (402 and 404), the controller being programmed with a control scheme that calculates the appropriate combination of wavelengths of light that need to be emitted by the first and the second monochromatic light source, respectively, such that the light color axis intersects a white region on the chromaticity graph, the controller further configured to: tune the first and second light sources by altering the intensity of the first and second light sources such that the light produced from mixing the first and second light sources represents a point on the light color axis that is located within the white region on the light color axis. tune the first and second light sources by altering the intensity of the first and second light sources such that the light produced from mixing the first and second light sources represents a point on the light color axis that is located within the white region on the light color axis.