Evan Designs U1F Simulated Fire 1.8mm LED Kit 1.8mm LED dia. great for a fire scene made up of 1 flaahing red, 1 flashing orange, 1 solid orange The electrical componets allow you to use AC/DC/DCC, 7-19volts, completely assembled You can use a 9v battery, track power, 12v adapter to light our LEDs each set comes with a resistor, capacitor & rectifier, thus no polarity issues A 12 volt 2 amp adapter (PDC12) will run 100 LEDs