Shade the Light

Second level Wizard spell, range 30 ft, duration 10 minutes +1 minute per spellcaster level.
When Shade is cast on a light source, light from that source is visible only to creatures within 3 ft of it. For example, if Shade is cast on a roaring wood fire in a hearth and there is a lighted candle across the room, an observer within 3 ft of the fire sees a fire-lit room, but an observer farther away a candle-lit room. For the spell to affect magically created light, the caster must make a successful die roll at +4 as if to dispel the magic underlying the light source. Success does not actually dispel this magic; it merely enables the Shade spell to affect the light.