Designed for controlling Single T5 39 Watt Fluorescent Lamps this Huco High Frequency HO Ballast features not only automatic shutdown in the event of lamp failure, but over-voltage protection and flicker-free warm start. Further benefits include constant light independent of mains voltage fluctuations, slim and lightweight design and dimensions of just 360mm x 21mm x 30mm (length x height x width). This dimmable high output gear is more energy efficient than conventional ballasts reducing energy consumption by 60% and lasting 50,000 hours.