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