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