The light conversion sub assembly includes {HEAD ~ at least a portion} that is {TAIL ~ a polytetrafluoroethylene material} that also includes a wavelength converting material 
is
The light conversion sub assembly includes { HEAD ~ at least a portion } that is { TAIL ~ a polytetrafluoroethylene material } that also includes a wavelength converting material
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH