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Yes, outdoor lights and receptacles should be on a ground-fault circuit interrupter (GFCI) for safety. The outdoors is considered a wet location where GFCI protection is generally required. A GFCI enhances safety by automatically tripping and shutting off the circuit if it detects an imbalance, which protects against electrocution and reduces the risk of an electrical fire. While it is the safest approach for all outdoor electrical components, specific requirements can vary depending on the type of light (e.g., pool lights), its location, and local electrical codes. For guidance tailored to your specific situation, it's best to consult a professional electrician.

Your maintenance needs revolve around the type of foundation you choose, as well as how you furnish or decorate it. Patios require little else other than the occasional hose-down, but decks and other wooden structures will require annual power washing and sealing. You may also need to restain the wood every two to three years.

Adding a solid roof rather than building a pergola or leaving the space open will make maintenance much easier. Without a roof, you will need to spend more time sweeping, washing, and covering your furniture to protect it from UV bleaching.

While wet-rated and damp-rated lighting is designed to handle contact with moisture, there’s a difference between the two. Wet-rated lighting is safety-rated to be placed in areas with direct exposure to water, including your shower. Fixtures classed as wet-rated are made with waterproof seals to protect the filament and other electrical components from water and moisture. 

Damp-rated fixtures can be used in places with some moisture contact, but not direct exposure. They don’t have the same waterproof seals used in wet-rated fixtures. Damp-rated lighting can be used on your bathroom ceiling or along a wall outside of your shower.

Pool lights are designed to be safe by protecting swimmers from electrocution. These lights are made with waterproof fixtures and seals to prevent contact with the water.

Electrocution from pool lights is still possible, but rare. Faulty wiring or broken lighting equipment can make lights unsafe, so it’s important to replace lights as needed and have an electrician inspect and upgrade the wiring.