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.