[[ File:Cropped Used WG Loss LengthwiseDSC 0169.JPG |thumb|center|Figure 1: The effect of many surface imperfections becomes obvious when looking at a length of illuminated light guide. (Previously processed light guide. MFR: Saint Gobain BCF-98)]] | [[ File:Cropped Used WG Loss LengthwiseDSC 0169.JPG |thumb|center|Figure 1: The effect of many surface imperfections becomes obvious when looking at a length of illuminated light guide. (Previously processed light guide. MFR: Saint Gobain BCF-98)]] |