@ LCUBED3

  On ballast in the US

   Powerfactor has do with current being in phase with voltage
  That that dont determin the lamp brightness. 

  U can have a high power factor with low ballast factor output
  The ballast factor is the drive current going to the lamp that is operating.  Lot commercial high bay T8 tend use ballast factor
 Of 1.15 driving a F32 lamp at 36- 40 Watts. 

  While residental grade T8 32 watt ballast with a ballast factor
 .8 would be driving a F32 T8 at 25 watts .

    I have also seen HX full power output magnetic ballast.