Light

From LSWiki

[Spell      :] Light
[Level      :] One
[Reversible :] Yes
[Sphere     :] Conjuring
[Components :] None
[Usage      :] cast light [-]
[Effect     :] Casting light brings forth a magickal light to 
                illuminate the caster's way.  Casting the
                reverse, dark, will banish a magickal light
                if one is summoned, otherwise it will summon
                a magickal darkness.