A light integrating column having an illumination column and windows that allow light to enter and exit the illumination column. The illumination column can be a solid rod or a hollow tube. In an embodiment, the windows are formed at an angle with respect to each other. Light from a light source enters through one of the windows. The light is internally reflected and diffused inside the illumination column. A diffused uniform light is transmitted out through another window. In an embodiment, a reflective coating is applied to a surface of the illumination column.