Need something more convenient than a gas lantern, or something for your emergency kit? Check out the Luminaid ($40), an inflatable light bag. It’s basically a solar panel slapped on a bag, which you then inflate to diffuse light. It’ll illuminate for eight to ten hours, or you can put it on a lower setting for fourteen to sixteen hours. It’s also waterproof up to a meter deep, which is handy if you’re about to do a water level.