Designed for use in any environment, the 100W J-Track Transformer by WAC Lighting helps protect and extend the lifespan of your lamp. The transformer converts 120V input to 12V output. It protects the lamp from overloads and short circuits by reverting to a holding position and turns back on by itself, thanks to its built-in auto reset. Soft start feature delays the rapid inrush of current and extends the lamp's life.