The 30-Day Duro earns its name honestly: it runs for a full 30 days straight on its low setting, which is exactly the quality you want in a lantern that sits in a closet waiting for a power outage. On high it throws 1,000 lumens of clean area light, and it steps down through medium, a 30-lumen low, an amber candle-flicker mode, and SOS. The rubberized, impact-resistant housing shrugs off drops, the power button glows in the dark so you can find it when the lights are already out, and it runs on common D batteries rather than a proprietary pack. This is the set-it-and-forget-it emergency lantern.