HQUA Water Sterilizer Ballast is designed for our relevant UV lamps.As a part of the water sterilizer,this ballast could working perfectly in the whole American Power Grid.With good quality,it's lifetime is 3-5 years,but the uv lamps must be replaced every year to ensure it's working right.The design of circuit and thickness of the electric wire to ensure the safety.This ballast will be a good choice if you need one professional product like this in your water purification system.