The filament cathodes mounted in a fluorescent display tube can reduce {HEAD ~ the power consumption} of {TAIL ~ the fluorescent display tube} 
The filament cathodes mounted in a fluorescent display tube can reduce { HEAD ~ the power consumption } of { TAIL ~ the fluorescent display tube }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL