Flashlights & Lanterns
A flashlight and a lantern are not the same tool wearing different shells. One throws a tight beam down a road or into a crawlspace; the other fills a room with soft, even light so a family can eat, read, and stay calm together. Most homes need both, and most people own neither until the night they do.
The best decision you can make across your lights is to pick one battery and stop. A household where the flashlight, the lantern, and the headlamp all run on the same cell, whether that is an 18650 or a common AA, is a household where a single spare pack keeps every light alive. Runtime matters more than peak brightness here: a lantern that quietly holds a low, warm output for two nights beats one that blazes for an hour and dies.
Put light where people gather and where they move. A lantern anchors the [Power Outage] and [Shelter-in-Place] kits, on the kitchen counter and by the bed; a flashlight rides in the [Go-Bag] and the car for the jobs that need a beam, not a glow. Keep them charged or keep the spares beside them, because a dark house finds every light you forgot to test.