ATI T5 Ballast Date Published - 5th March 2020 - Published by - iQuatics Ltd ATI T5 Ballasts can be replaced with the iQuatics range of Helvar Ballasts. ATI T5 ballasts have for many years been used in ATI T5 lighting systems. iQuatics now have a range of ballasts that can be used as a direct replacement for the ATI T5 ballast. We stock twin non dimmable ballasts in 24w, 39w & 54w and single 80w ballasts. As many ballasts have a different amount of terminals iQuatics provide a comprehensive wiring guide with all of there ballasts to ensure that your switch from a ATI T5 ballast to an iQuatics ballast is as seamless as possible, and for the rare occasion you have a ballast we haven’t covered our industry leading customer support team will be only to happy to lend a hand and figure out your wiring for you.