Shed some light to your camp site without having to connect to a power grid. The eco-friendly Pisat K-Light Solar Lantern ($50) features 16 bright LED bulbs powered by a rechargeable NiMH battery charged by solar panels. The rugged K-light is highly water-resistant and can also be used as a lantern or flashlight with two brightness settings. Placing the solar panel on direct sunlight for an hour will provide two hours of continuous light on low setting and an hour on high. [source]