Lights integrated into stairs. Late at night, the stairs can be lit (and safe) without ruining your night vision with bright overhead lights. Would also be a great way to really highlight a gorgeous staircase.
Friday Favorites + Summer Veggie Pasta Skillet Recipe
Pure White Interior by Susanna Cots. Note the use of lights to make the narrow staircase feel wider. In other designs, the lights are installed on both sides of the staircase, alternating up the steps.