This Lamp Runs on Salt and Water

Discover how the Watter Lamp works using only salt and water to power LED lights. This emergency lamp relies on a simple chemical reaction based on the principle of a galvanic cell, also known as a saltwater battery. The process begins by adding ordinary water to the marked level, followed by a measured amount of salt. Inside the lamp, metal electrodes—usually magnesium or aluminum and carbon—react with the saltwater electrolyte, allowing electrons to flow and generate electricity. This fascinating device shows how basic chemistry can be used to create a practical emergency light, making it useful for camping, power outages, survival situations, and science demonstrations.