Currently there are two types of commercially available lightning protection systems, passive systems that don’t perform a special action during lightning, and active or ESE (Early Streamer Emission) systems that has as a target to anticipate the lightning strike. The operating principle is the same in both systems, but the active ones have an increased ability to attract the lightning and greater protection radius due to an extra ionization. Bigger radius means less protection elements needed, which in turn makes the ESE systems less expensive and with reduced visual and aesthetic impact.