Paradise Black Plug-In Weatherproof Transformer with Astronomical Timer 12V 120WParadise introduces this transformer with great technology that allows you to control your outdoor lighting system more efficiently. With sun tracking technology, this Paradise GL33120 has a dusk to dawn photosensor time function and astronomical timer. The 12v transformer automatically turns on at dusk and off at dawn. Paradise's unique 120 watt transformer comes with a rust proof and impact resistant exterior casing that caters to its durability.