Everbright Lantern

From Eberron: Rising From the Last War, page 277; and Wayfinder's Guide to Eberron, page 115.

Description
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.

Wayfinder's Guide to Eberron
Consult your DM before using this version. It is usually considered unofficial and invalid due to updated material.

An everbright lantern contains an Eberron dragonshard imbued with the effect of a Continual Flame spell. This bright light is mounted inside a normal bullseye lantern, allowing the light to be shuttered off. An everbright lantern provides clear illumination in a 60-foot cone and shadowy illumination in a 120-foot cone, just like a mundane bullseye lantern, but its flame never goes out.