As sunburst, except as noted here. Light burst deals 15d6 points of damage to undead creatures.
Sunburst causes a globe of searing radiance to explode silently from a point you select. All creatures in the globe are blinded and take 6d6 points of damage. A creature to which sunlight is harmful or unnatural takes double damage. A successful Reflex save negates the blindness and reduces the damage by half.
An undead creature caught within the globe takes 1d6 points of damage per caster level (maximum 25d6), or half damage if a Reflex save is successful. In addition, the burst results in the destruction of any undead creature specifically harmed by bright light if it fail its save.
The ultraviolet light generated by the spell deals damage to fungi, mold, oozes, and slimes just as if they were undead creatures.
Sunburst dispels any darkness spells of lower than 9th level within its area.
For every additional power point you spend, the power deals an additional 1d6 points of damage. For each additional 2d6 points of damage, the power's save DC increases by 1.