Will there be any power quality problem with using LightWizTM AES?

LightWiz^TM AES products use proven, highly reliable and efficient toroidal transformer technology for power reduction hence they do not affect the existing power quality (current THD) of the lighting circuit which it is connected to nor does it distort the AC sine wave voltage. Unlike other energy saving equipments that use high speed solid state switching or poor quality EI transformers to control the power to lighting circuits, which may contribute to deteriorated power quality and current harmonics. Therefore, LightWiz^TM AES is suitable for use in EMI (Electro-Magnetic Interference) sensitive areas like telecommunication and hospital facilities.

Will there be any power quality problem with using LightWiz^TM AES?