Thus, {TAIL ~ the voltage} dropped on {HEAD ~ each incandescent filament lamp} rises slowly and the incandescent filament lamps are safe 
Thus , { TAIL ~ the voltage } dropped on { HEAD ~ each incandescent filament lamp } rises slowly and the incandescent filament lamps are safe
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH