You use the cover of darkness to Great advantage in combat.
Benefit: When you make a sneak attack in an area of dim light against characters without darkvision or the ability to see in darkness, you gain a +1 bonus to your attack roll and your sneak attack damage increases by 1d6. In areas of total darkness, this bonus increases to +2 to attack and 2d6 extra damage. With 10 or more ranks in Stealth, these bonuses double. You must still be able to see your opponents in order to sneak attack them, either by attacking from a dark area into a lit area, or through the ability to see in darkness.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.