An illumination apparatus includes a light bar having a first end for receiving light from a light source. The light bar includes material that supports propagation of said light along the length of the light bar. Turning microstructure is disposed on a first side of the light bar. The turning microstructure is configured to turn at least a substantial portion of light incident on the first side and to direct the portion of the light out a second opposite side of the light bar. A substantially reflective surface is disposed with respect to a second end opposite said first end of said light bar to reflect light transmitted through the second end. A light guide panel is disposed with respect to said second opposite side of the light bar to receive light turned by said turning microstructure and directed out of the second opposite side of the light bar.