It is intended that {HEAD ~ a plurality} of such reflective pairs or groups may be assembled in {TAIL ~ a properly oriented bank} of any desired length, according as the energy demands of the application required 
It is intended that { HEAD ~ a plurality } of such reflective pairs or groups may be assembled in { TAIL ~ a properly oriented bank } of any desired length , according as the energy demands of the application required
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH