Celestial Light

You touch one object that is no larger than 10 feet in any dimension. Until the spell ends, the object sheds bright light in a 20-foot radius and dim light for an additional 20 feet. The light produced by this spell is considered sunlight. Any undead or fiend standing in the light takes 1d4 radiant damage at the start of it's turn. Completely covering the object with something opaque blocks the light. The spell ends if you cast it again or dismiss it as an action.

Any stealth checks made in the illuminated area are made at disadvantaged.