StairLighting System LLC The Stairlighting Kit from StairLighting System enables users to increase the visibility and safety of both interior and exterior home staircases. It consists of three-beam LED spotlights, plug-and-play wiring harnesses, and all necessary fasteners. Features include photocell technology that senses ambient light and automatically turns the product on and off, and lighting elements that do not create heat. 888-305-4232, StairLightingSystem.com.