DND 5th Edition

Source: Eberron - Rising from the Last War

Wondrous item, common

This bullseye lantern contains an Eberron dragonshard that sheds light comparable to that produced by a Continual Flame spell. An everbright lantern sheds light in a 120-foot cone; the closest 60 feet is bright light, and the farthest 60 feet is dim light.