Light

(a firefly or phosphorescent moss)
One object, no larger than 10 feet in any
dimension. Until end, sheds bright light in a
20-foot radius and dim light for an additional 20
feet. Any color you like. Block light by covering
completely. Spell ends if you cast it again or
dismiss it as an action.
If you target an object held or worn by a hostile
creature, that creature must succeed on a
Dexterity saving throw to avoid the spell.