The lighting and light-signaling systems with power supply that we find in the different types of way are designed to be connected to "outlets with two active live poles". Regardless of whether the source of the power supply is a battery charged by an electrovoltaic cell or an urban voltage socket, power cables are always required to reach the lamp, LED bulb or lighting device.

However, this need for wiring of lamps and signals generates important drawbacks related both to safety against electrical accidents and to the complexity of a wiring installation to the huge amount of light elements that can be incorporated onto the tracks. In addition, there is the inconvenience that a vehicle may accidentally collide, leaving open the possibility that the power cables cause an additional electric accident, such as an electric shock or a spark that can cause a fire or explosion in case of a spill of fuel.


Because of the drawbacks mentioned above, many of the signs used on public roads are reflective in nature. The great disadvantage of these reflective means vis-a-vis the active illumination is obvious, but since wiring each small light element located in the center or the sides of a road would imply unacceptable costs and risks, it is generally opted for this simple and well-known Reflective technology.