The Tulip lantern is the only camping lamp to automatically adjust its focus. When the bulb is hung, three hinged reflectors surround it, forcing the light into a beam; when upright, the reflectors fall away from the bulb and the light diffuses into a halo. Snow Peak Tulip Lantern:$150
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.