Lighting embedded within a staircase handrail.
LED ribbons 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. @ Home Renovation Ideas
Square handrail for steps Rocky Mountain Hardware Stepped Handrail Bracket
Do it Yourself: Stairway Handrail Installation, stairs with carpet ripped out - risers painted white and steps stained, board and pattern moulding / molding on walls, nice wood railing