{TAIL ~ second voltage source}, separate from {HEAD ~ said first voltage source} means and connected to said common anode contact, 
{ TAIL ~ second voltage source } , separate from { HEAD ~ said first voltage source } means and connected to said common anode contact ,
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH