Further, the present invention relates to {HEAD ~ a system} that integrates {TAIL ~ light fixtures} with a suspended grid ceiling or a solid ceiling 
Further , the present invention relates to { HEAD ~ a system } that integrates { TAIL ~ light fixtures } with a suspended grid ceiling or a solid ceiling
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH