Have 2 electronic distributors , Mopar and Petrinix

since putting in the mopar distributor have had problems with car stalling when I turn on the lights at idle , could this have something to do with the wrong ballast resistor or ECU? Or is it just a fluke that it happened when I changed distributors ?
If I am driving car seems to run fine as soon as I pull up to a stop sign car starts to stutter and stall , but only when the lights are on , lights off everything runs fine .
Another question , which ignition system is most reliable , Mopar electronic or Petronix ? At least in your opinion .