Despite being less reflective than {HEAD ~ other materials} that may be used in {TAIL ~ the light conversion sub assembly}, the PTFE material unexpectedly produces an increase in luminous output, compared to other more reflective materials, when the PTFE material includes a wavelength converting material 
Despite being less reflective than { HEAD ~ other materials } that may be used in { TAIL ~ the light conversion sub assembly } , the PTFE material unexpectedly produces an increase in luminous output , compared to other more reflective materials , when the PTFE material includes a wavelength converting material
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