Osram Sylvania Quicktronic 120-277V Professional Series Light Transformer Quick 60+600V Voltage Ballast The Sylvania Quicktronic 120-277V Professional Series Quick 60+600V Voltage Ballast is a transformer designed for professional use in lighting systems. With a voltage range of 277V, this ballast allows for efficient and reliable power supply to various lighting fixtures. As part of the Sylvania brand, known for its quality and durability, this product ensures consistent performance and safety in commercial and industrial settings. Ideal for maintaining optimal lighting conditions in homes, gardens, and commercial spaces, this voltage ballast is a reliable and essential component for any lighting system.