Luminous Smite 2014

The next time you hit a creature with a melee weapon attack before this spell ends, the weapon flashes with otherworldly light, dealing 2d8 additional radiant damage. Until the spell ends, the target can’t be invisible, isn’t obscured by a darkness spell, and sheds dim light in a 5-foot radius.

When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases by 1d8 for each slot level above 2nd.