What does replacing a pool light involve?

Replacing a pool light is an electrical job, not a handyman swap. A licensed electrician or a qualified pool technician de-energizes the circuit, replaces the light or its cord, uses a fresh gasket and confirms that the circuit is protected and bonded. Do not attempt it yourself, and do not accept a quote from someone who cannot show a Virginia licence.

Why this is a pro job

The light sits in water and is powered through a cable run from a junction box, so a mistake can shock swimmers as well as the person doing the work. Pentair's pool light manual says the light must be installed by a licensed or certified electrician or a qualified pool serviceman, in accordance with the National Electrical Code and all applicable local codes.^[1] It adds that the power to the pool light must be disconnected at the circuit breaker before servicing.^[1]

What a pro handles

The details vary by fixture, so a good technician works from the manufacturer's instructions for your model. Pentair's manual for its pool light points to these areas.

Power. The technician switches off the main electrical switch or circuit breaker as well as the switch that operates the light itself.^[1]

The cord and connections. Replacing a light can mean replacing its cord, which runs through conduit to a junction box. Pentair notes that under no circumstances replace lights by splicing wire under water or behind the niche.^[1] A longer or awkward conduit run means more labor.

The right part and a new gasket. The replacement must be the same type and wattage, because Pentair warns that a different type will damage the assembly and may cause an electrical hazard.^[1] When a light is opened, Pentair says to install a new lens gasket every time, because reusing the old one may let water leak into the assembly.^[1]

Testing. Pentair warns that its light must never run for more than ten seconds unless it is totally submerged, because it will get extremely hot and may burn people or break the lens.^[1]

Safety checks around the light. Pentair lists what the electrician should confirm: the lighting circuit has a ground fault circuit interrupter (GFCI) for line voltage models and an appropriately rated circuit breaker, and the light fixture and metal items within 5 feet of the pool are properly electrically bonded.^[1] If an older pool lacks these, bringing it up to standard is extra work.

Permits

Virginia's building code requires a permit application before installations or alterations involving electric wiring, and for emergency equipment replacement the application is due by the end of the first working day after the work starts.^[2] The same section says application for a permit is not required for replacement of luminaires (lighting fixtures) in a single dwelling unit, and the building official may deem other repair work minor and ordinary.^[2] Whether an underwater pool light falls under that exemption is a question for your local building department, so ask it or have the electrician confirm. If you are changing the wiring or adding a light, assume a permit is needed.

When to call a licensed pro

Always. In Virginia no individual may work, or offer to work, as an electrical tradesman without a tradesman licence, unless working under the supervision of a tradesman licensed in that specialty.^[3][4] Virginia defines a tradesman as someone who works for the general public for compensation in the electrical, plumbing and heating, ventilation and air conditioning trades.^[3] DPOR also says that if the work is valued at $1,000 or more, a valid Virginia contractor's licence is required for the licence category in which the contractor is to work.^[5] Use the DPOR licence lookup before you agree to anything, and see how to check if a contractor is licensed in Virginia.

Call a pro straight away if the light flickers, trips the GFCI, shows water inside the lens or stops working. Do not swim until it has been checked. To budget the job, read how much pool light repair costs in Virginia, see more pool and spa equipment answers or browse pool and spa businesses.

When you are ready, describe the pool light job and licensed local businesses will respond.