Said invention provides self luminosity by {HEAD ~ means} of {TAIL ~ a plurality} of glass microspheres containing both a light emitting phosphor and a radioactive gas 
Said invention provides self luminosity by { HEAD ~ means } of { TAIL ~ a plurality } of glass microspheres containing both a light emitting phosphor and a radioactive gas
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH