Continual Light {Priest}

This spell is similar to a light spell, except that it is as bright as full daylight and lasts until negated by magical darkness or by a dispel magic spell. Creatures with penalties in bright light suffer them in this spell's area of effect. As with the light spell, this can be cast into air, onto an object, or at a creature. In the third case, the continual light affects the space about one foot behind a creature that successfully rolls its saving throw vs. spell. A failed saving throw means the continual light is centered on the creature and moves as it moves. Note that this spell also blinds a creature if it is successfully cast upon the creature's visual organs. If the spell is cast on a small object that is then placed in a light-proof covering, the spell effects are blocked until the covering is removed.
Continual light brought into an area of magical darkness (or vice versa) cancels the darkness so that the otherwise prevailing light conditions exist in the overlapping areas of effect. A direct casting of a continual light spell against a similar or weaker magical darkness cancels both. This spell eventually consumes the material it is cast upon, but the process takes far longer than the time in a typical campaign. Extremely hard and expensive materials might last hundreds or even thousands of years.

Reverse: Continual Darkness

The reverse spell, continual darkness, causes complete absence of light (pitch blackness), similar to the darkness spell but of greater duration and area.

Reversible

Sphere: Sun
(Alteration)
Level: 3

Range: 120 yards
Components: V, S
Duration: Permanent
Casting Time: 6
Area of Effect: 60-foot-radius globe
Saving Throw: Special