Anti-fouling system using energy harvested from salt water

An anti-fouling lighting system configured for preventing or reducing biofouling on a fouling surface of an object that during use is at least temporarily exposed to an electrically conductive aqueous liquid, by providing an anti-fouling light to said fouling surface, the anti-fouling lighting system comprising:

• a lighting module comprising a light source configured to generate the anti-fouling light;
• and
• an energy system configured to locally harvest energy and configured to provide electrical power to said light lighting module, wherein the energy system comprises a sacrificial electrode in electrical connection with a first electrode of the light source, and a second energy system electrode in electrical connection with a second electrode of the light source, wherein the energy system is configured to provide electrical power to the lighting module when the sacrificial electrode and the second energy system electrode are in electrical contact with the electrically conductive aqueous liquid.