 It allowed for a shorter ignition time and required less space than the standard AC ignitors found in standard Super Trouper followspots.Then, in 1997, with the introduction of Strong's new, compact 1 kW-3 kW switching power supply it became clear that the existing AC ignitor assemblies in the original Super Trouper (and not Super Trouper II's) were not functionally compatible with the new power supplies.Over the next several years, DC ignitor assemblies began to gradually replace the older AC ignitors.