Tybalt's Faux Fireball

You point to one object that is no larger than 10 feet in any dimension. Upon casting a ball of fire grows in your hand as it reaches 1ft you must throw it at the object, the fireball will fly through the air to the object, on a successful hit, Until the spell ends, the object sheds bright light in a 20-foot radius and dim light for an additional 20 feet.  Completely covering the object with something opaque blocks the light. The 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. The spell does no damage whatsoever, if the target is a creature then they have disadvantage on their next attack roll.