Lightning arcs from your fingertips in a 15-foot cone. Each creature in that area must make a Dexterity saving throw, taking 2d8 lightning damage on a failed save, or half as much damage on a successful one.

The lightning ignites flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.