Dispersion

You target one magical light or magical darkness source that is no larger than a 60 foot sphere you can see within range. The radius of the light or dark source is doubled, expanding out to reach that distance 5 feet per round. This spells duration becomes the same as the remaining duration of the light or dark source that was targeted. If the light or dark source that was targeted does not have a duration, the effect lasts for 24 hours. This spell has no effect on a light or dark source under the effects of an instance spell.