“Your Karma shines twice as bright. Whether good or bad, your Karma is doubled for any kind of reaction or modifiers.”— Fallout 2 in-game description description
Karma Beacon is a perk in Fallout 2.
Modifier from Karma is doubled when calculating NPC initial reaction when starting a dialogue.
In Fallout 2, Karma doesn't directly affect NPC reaction (only through reputation titles), and this perk has no effect in the game.[verified]