Ultrapure UPP50 Starter Ballast Power Supply Kit. The Ultrapure UPP50 Starter Ballast Power Supply Kit made by Ultrapure contains the tridonic transformer for the Ultrapure Ozonator System. This starter and ballast kit works only for the UPP50 Model Ozonator. We STRONGLY recommend replacing both the bulb and ballast kits at the same time.