[[File:Bright Clear Nearly Perfect DSC 0019.JPG|thumb|center|Figure 6: Top view of light guide recently cut from spool. Uniform brightness indicates few surface abnormalities. (MFR Saint Gobain BCF-98)]] | [[File:Bright Clear Nearly Perfect DSC 0019.JPG|thumb|center|Figure 6: Top view of light guide recently cut from spool. Uniform brightness indicates few surface abnormalities. (MFR Saint Gobain BCF-98)]] |