The flashlight accessory is a device that attaches onto a lighted end of an existing flashlight, and which reflects light radially from said flashlight in order to produce lighting consistent with a lantern. The flashlight accessory includes a hollowed cylinder within which a reflective cone shaped surface reflects light radially with respect to the hollowed cylinder. The hollowed cylinder includes an opening upon which the lighted end of the flashlight is placed against. A strap is provided at a distance above said opening in order to secure the flashlight accessory onto the lighted end of the flashlight. At least one hook is included on a distal end of said cylinder, and which enables the accessory to hang from an object in a manner consistent with a traditional lantern.