20+ Hour Runtime Flashlights & Lamps

Most flashlight runtimes are quoted on the lowest brightness setting, and for a genuine emergency light or an overnight camping trip, that low-mode figure is usually what actually matters: how long it keeps working, not how bright it is for the first hour.

Every light on this page is rated for 20 hours or more on its lowest setting, several run for a full day or beyond. If you need maximum brightness for a short burst rather than steady light for hours on end, check the lumen rating instead, runtime matters less for that use case.