This spell is similar to a light spell, except that it lasts until negated (by a continual darkness or dispel magic spell) and its brightness is very great, being nearly as illuminating as full daylight. It 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 the creature if the latter makes its saving throw. Note that this spell will blind a creature if it is successfully cast upon the visual organs, for example. Its reverse causes complete absence of light.