to run the lamps in series all i should have to do is run a jumper wire between the two ballasts that do not have the power or the return lines, correct? also, does there have to be a jumper on both sides of the ballasts i am jumpering together, as in, one for each pin. I currently have all four power wires in seperate terminals on the power side (there were four holes) and the yellow return wires in seperate terminals- one on each side for each pin. Let me know if there is a problem with this and which way is the correct way- because i have learned in the automotive repair business, "just cause it works dont mean its right". Someone told me with fluorescent bulbs they may run hotter or have a decreased operational life without a jumper between the two pin sides while overdriving them with an electronic ballast. Please let me know what your experience is with this-- all the help i can get is much appreciated.