In comparison with the single capacitive circuit, the compensated circuit has a parallel capacitor instead of a series capacitor. It also includes the gear required to start and operate a fluorescent lamp, i.e. a Starter and a Ballast. The power factor is almost completely corrected by the capacitor connected in parallel to the mains. The parallel capacitor also provides radio interference suppression.

Parallel kompensate cos j ³ 0,9