All you need is power! This is the quickest and easiest way to add lights to any project. Set includes two warm white LED Stick-On Lights. Use the individual dimmer controls to regulate light brightness. Add an optional Auxiliary Switch for convenient operation. RoHS compliant. You will need one Just Plug Power Supply to power up to 50 lights on your light system, or if you want to power your system from a train power pack, purchase Connecting Cables WOO5760.