The 75W Electronic Transformer by WAC Lighting ensures circuit protection for a safe illumination. This efficient transformer converts 120V input charge to 12V output charge for safe use in outdoor spaces. The device takes a pause when it detects system overload or short circuit and resets on its own. A soft start feature prevents sudden inrush of current to extend the lamp life. You can dim fixtures by installing an electronic low voltage dimmer to the transformer's primary side.