Create Magical Sun

You create a magical sun that sheds bright light in a 40-foot radius and dim light for an additional 40 feet. The caster may set a time for the light to dim and turn off or even set a command phrase that turns it on and off. The magical sun created by this spell deals 4d10 radiant damage to any undead who enters the bright light radius created by this spell or start their turn there . While plants are under the bright light shed by this spell they grow without the need for sun and yield twice the normal amount of food when harvested.