TSPDC100 DC 100W Digital 12V Low Voltage Transformer with Photocell & TimerThis heavy duty 100 Watt DC low voltage digital transformer is an energy efficient, safe, reliable outdoor transformer with 12V Output. It has a built in photocell and digital and astronomic timer so you can set it once and forget. This 12V DC low voltage transformer is ETL and UL certified so its a reliable, qualified product. This digital transformer is compatible with DC halogen and LED bulbs, not AC bulbs and dimmers, so it's perfect for interior