Bright Brotherhood

 is a devout religous faction, made up almost completly of Ghouls. Led by Jason Bright, they hope to take a 'Great Journey' away from the Mojave Wasteland.

Background
The Bright Brotherhood are a group of ghouls who are sick of being looked down on by humanity on the whole and want to create a new life for all ghouls in space, even if they are feral. Their intend to use the rockets at the REPCONN aerospace research facility in the Mojave Wasteland near New Vegas to begin their 'Great Journey'.

Interactions with the player character
They appear during the quest Come Fly With Me. Their leader, Jason Bright, believes the Courier to be sent by 'the Creator' to stop "demons" and allow them to continue with the 'Great Journey'.

Non-Quest Appearances
Many robed bright followers can be found strewn across the Mojave Wasteland, such as at Primm Pass, East of Primm, and the Coyote Den, north of Nipton (probably as a feast for the Coyote Mother's young). These are obviously followers who died during their perilous "Great Journey" seeing as how these bodies wear Bright Brotherhood robes rather than the space suits they are last seen in.

Appearances
The appears in Fallout: New Vegas.

Behind the Scenes
The name of the Bright Brotherhood is most likely a reference to the Dark Brotherhood, a faction in the game The Elder Scrolls IV: Oblivion.