Filament lamps operate normally at a power factor of
Filament lamps operate normally at a power factor of Unity.
Filament lamps, also known as incandescent bulbs, have a resistive load, which means that their power factor is always unity (1.0) when operating under normal conditions.
This is because the current and voltage in a resistive load are in phase, which means that the power factor is equal to the cosine of the phase angle between the current and voltage, and in a resistive load, the phase angle is zero.
A power factor of unity means that all the power supplied by the source is being used by the load, and there is no reactive power being generated or absorbed.
Therefore, there is no need for power factor correction or compensation when using filament lamps.