Green Force underwater lighting systems are recognized world wide for producing a superior diving lighting system. Complete systems can be built according to a divers needs. All the connections of the battery packs and the lightheads are identical. All the components are interchangeable. The diver has the choice between 8 battery packs and 20 lightheads that vary from halogen, LED to HID and are all compatible and modular. You can start for instance with a basic battery pack and lighthead combination and upgrade your torch package without huge costs.