Pool lighting installation, which is electrical work, not decorating

What is pool lighting installation?

Pool lighting installation means fitting a luminaire into a niche in the pool wall, running its cable through conduit to a junction point above the water line, and connecting it through appropriate protection - with the niche, the fixture and the surrounding metal tied into the pool's electrical bonding system. In an existing pool, most of the job is determined by what is already buried: the niche, the conduit and the cable route. Changing the fixture is often straightforward; adding a light where there is no niche means opening the pool shell and usually the deck.

Signs you need pool lighting installation

• Your light has failed and the fixture is old enough that replacement parts are a hunt
• The pool is unusable after dark, which in hot climates removes the most comfortable hours of the day
• You have a single dim fixture in a pool that has since gained a spa, a ledge or a deep end it does not reach
• Water has got into the fixture, or the lens is fogged, cracked or missing
• You are already resurfacing or remodeling, which is the only cheap moment to add or move a niche
• You want colour or scene control tied into an automation system you already have

Seeing something not on this list? Browse pools problems by symptom →

How pool lighting installation actually works

1. 1

   Establish what is already in the wall

   The niche size and type, the conduit run, the cable and where it terminates dictate what fixtures will physically and electrically fit. This is an inspection, not a catalogue exercise.

   Watch forA fixture ordered from a website before anyone has looked at the niche. Niches are not universal, and a fixture that does not seat properly in one is not an installation you want in your pool.

2. 2

   Choose the fixture and the supply arrangement

   Modern pool lighting is predominantly LED, in either line-voltage or low-voltage arrangements, with white or colour-changing options and, on some, control integration.

   Watch forAssuming any LED drops into any niche on any existing wiring. Voltage, transformer requirements and control signalling all have to match what is buried, or the buried part has to change.

3. 3

   Cable, conduit and the junction above the water

   The fixture cable runs through conduit from the niche up to a junction point positioned above the water line and clear of the deck, where the connection to the supply is made.

   Watch forConnections made below the required height, or in an enclosure that is not rated for the location. This is exactly the kind of shortcut that looks fine and is the reason the rules exist.

4. 4

   Bonding - the part that makes the pool safe

   The niche, the fixture and the metal in and around the pool are connected into the pool's equipotential bonding system so that no dangerous voltage difference can exist across the water and the deck.

   Watch forBonding described as optional, legacy or someone else's job. Electric shock in a pool is a fatal-risk hazard, this is the system that prevents it, and the requirements are set in electrical code and enforced by inspection. Insist on a licensed electrician.

5. 5

   Protection, testing and inspection

   The circuit is protected as required for the location, the installation is tested, and in most jurisdictions it is inspected before the pool goes back into use.

   Watch forNo inspection where one is required. It is both a safety issue and something that surfaces awkwardly at sale.

6. 6

   Aiming, sealing and refill

   The fixture is seated, sealed as the manufacturer requires, the cable coiled in the niche so it can be pulled out for future service, and the pool refilled.

   Watch forA fixture installed with no service loop of cable in the niche. Without it, the next replacement means draining the pool rather than lifting the fixture out onto the deck.

What does pool lighting installation cost?

Replacing a fixture in an existing niche is a modest job dominated by labour and the electrical connection. Adding a light where no niche exists is a different order of cost entirely, because it means cutting the shell and usually the deck, and is only sensible during a remodel.

See the full pool lighting installation cost guide - by material, size and region →

If the number is the problem, here are the ways people pay for it →