A deck lighting system refers to a set of lighting fixtures installed on or around a deck or outdoor living space to provide illumination and enhance the aesthetics of the area. Deck lighting systems can include a variety of lighting fixtures such as post cap lights, stair riser lights, rail lights, and accent lights.

Post cap lights are typically installed on the top of deck posts and provide a soft glow to the surrounding area. Stair riser lights are installed on the vertical face of deck stairs to improve visibility and safety, while rail lights can be installed on deck railings to add ambiance and illumination.

Accent lights can be used to highlight specific features of the deck, such as a water feature or a piece of artwork. Deck lighting systems may also include LED strips or rope lights installed under the railing or steps to provide a subtle, indirect lighting effect.

The lighting fixtures used in a deck lighting system can be powered by electricity or solar power, and can be controlled by a switch, remote control, or timer. The design of a deck lighting system can be customized to suit the homeowner's preferences and the unique features of their outdoor living space.