The built-in pre-conditioner (+/- 20v) in the generator provides for a stable internal supply voltage. Light output, consumed power and system efficacy vary by less than 2% as a result of voltage fluctuations. Additionally Inda-Gro Induction Grow Lights offer a .99 PF and less then 10% THD.
Click here to learn more about Transient Voltage Surge Suppressive Devices you can install to clean up supply power.