Aqua Lamp is powered by salt water using a magnesium fuel cell and includes a pre installed magnesium power bar that when immersed in salt water, creates electricity. It uses regular table salt and tapwater, or seawater. The power bar will disolve after approximately 100 hours, thus stopping power generation, at this time simply replace the power bar and add more salt and water. The magnesium power bar and residual salt water are safe , non toxic and Earth friendly. Magnesium power bars can be stored for up to 25 years, the lamps Cree LED’s can last up to 50,000 hours.