Your low power factor is not directly metered. However, if "everyone" has a low power factor, the transmission cost of the electricity will go up. Because, as Rommie said, although the low power factor is not registered as power used, it does impact the current running through the conductors in the grid, in the transformers and in your home. Eventually that gets factored into everyone's power bill, so it's always best to compensate loads with a bad power factor.
We used to have a tanning bed with 10x 100w fluorescents, with conventional 230v choke ballasts, and no compensation capacitors. Although 1000w (4,3 ampere) is easily handled (at our 230v mains here) by any bog standard appliance cable, the cable on the tanning bed got seriously warm and soft. This was because the power factor of the choke ballast and lamp is together 0,53. that makes it look as if there was 8 ampere flowing through the cable.
It likely was a 3x 0,75mm2 cable, which would be fine for 1000w appliances, but woefully insufficient for 8 ampere, or loads that 'look like 2000w'. But i do not remember what cable was on it, sadly. 2000w heaters often run on 1,5mm2 cords and not heat up, so they likely seriously miscalculated the load on the cord.
The appropriate capacitor for the 100w ballasts here is 8µF, and an 80µF mains rated capacitor would've added significantly to the cost, so likely left out for that reason.
There should be no effect on how hot a ballast gets, it does not influence the current running through the ballast if it's just a compensation capacitor parallel to the mains connection.
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