High input PF (Power factor) does not always mean a high PE (power efficiency).

High input THD (Total Harmonic Distortion) implies EMI, EMC issues, does not meet regulations, low power efficiency and premature driver or ballast failure.

Impact of lighting technology choice and cost to avoid flicker known to induce headaches, fatigue...

Output THD and PF estimation requires special T&M equipment, please read more about tantratron's laboratory test equipment and/or watch videos.