Inner Light

Even when your innate powers over light fail you, you and your allies prove vigilant against dark forces, fighting until the end.

Prerequisite: Aasimar, dayl(ght spell-like ability.

Benefit: Whenever you cast your dayli[jht spell-like ability, you do so as if your caster level were one higher. Whenever an enemy successfully counters or dispels your dayli[jht spell-like ability, you and any allies within a 2o-foot radius gain darkvision 6o feet for a number of rounds equal to your character level. This is a supernatural effect.

Source: Blood of Angels