Before revision: The parallel resistors cannot have too low value as that would sink the zapping current; a series-parallel combination of resistors and antifuses is employed in such URL Street-lighting (obsolete) In a similar fashion to that of Christmas tree lights, before the advent of high-intensity discharge lamps, street light circuits using incandescent light bulbs were often operated as high-voltage series circuits.
After revision: The parallel resistors cannot have too low value as that would sink the zapping current; a series-parallel combination of resistors and antifuses is employed in such cases.Hindawi journals Street-lighting (obsolete) In a similar fashion to that of Christmas tree lights, before the advent of high-intensity discharge lamps, street light circuits using incandescent light bulbs were often operated as high-voltage series circuits.