Night Sighted( Unearthed Arcana, p. 89)
Your eyes are particularly well suited to using darkvision, but they are less well adapted to what others consider normal light.
Add 10 feet to the range of your darkvision. Drawback: You take a -1 penalty on Spot checks when in areas of bright light.
You must have darkvision as a racial ability to have this trait. Roleplaying Ideas: This trait might not affect a character's personality at all, but it might make the character prefer going on underground or nighttime adventures.