Two quick alternating strobes using 2 White LEDs. Similar to Ditch Lights, but don't "fade" in and out. Uses TPICO (0402) Cool White LEDs Z Scale Dual White Strobe$15.95PriceQuantity*Add to CartTech Specs6 - 12v DC or AC Power supply needed. Two (2) PICO (0402) Cool White LED 12" wire attached No resistors Needed for LED