Dusk And Dawn

Apprentice/shutters and clouds
Level/School: 1/evocation
Range: close (25 ft. + 5 ft./2 levels)
Area: 20-ft.-radius emanation centered on a point in space
Duration: 10 minutes/level (D)
Saving Throw: none
Spell Resistance: no

By drawing shade from the Plane of Shadow, or banishing shadows back to it, you control the level of illumination in the area.

You make a dark area lighter or a light area darker, blanketing the affected area in shadowy illumination. Creatures with darkvision can see through this area normally.