The innovative lantern has a waterproof lamp screen, which is hollow, pervious to light and filled with air. As it can float on water, it can be used on water as well as on land. The lantern can help the fishers attract fishes, and can flash on and off repeatedly to help a rescue team to locate a person having fallen into water, serving as an SOS signal giving device. It can also supply power to various electrical devices by the power terminal on the wire being inserted into lithium ion batteries with sockets. The head is changeable; you can change your lantern into a floodlight, a flashlight, or other upgraded accessories.