Light Tech LET151 150 Watts 12 Volts Low Voltage Compact Electronic Transformer Compact Electronic Transformer,150 watts Primary 120 Volt, 60 Hz, 1.25 Amps, Secondary 11.8 Volts, 30 kHz, 12.56 Amps Auto-reset electronic short circuit and overload protection Dimmable with standard dimmer 1.06 inch L, 1.38 inch W , 3.39 inch H