The Noctilight from Petzl is two-in-one, so to speak: it is both a protective case for the safe transportation of Petzl headlamps and a mini lantern. If you switch on the lamp in the case, the translucent protective case turns into a lantern with a variety of uses in the blink of an eye: It can be put down, hung in a camping tents or attached to your belts. A really practical little thing.