The phosphor is used in light source that comprises a UV radiation source to convert efficiently {HEAD ~ UV radiation} to {TAIL ~ visible light} 
to
The phosphor is used in light source that comprises a UV radiation source to convert efficiently { HEAD ~ UV radiation } to { TAIL ~ visible light }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL