Replacing a pool light with a color LED fixture typically costs $450 to $1,500 installed on a Collin County pool, and most jobs are done with the pool full. Where in that range you land depends on which part failed: the fixture comes out of the wall on its own cord, while the niche and conduit behind it need a drained pool.
That matters because many owners leave a dead light for two summers, expecting anything involving electricity and water to be expensive, when most are a fixture swap. The exception is a tripping GFCI, which is a safety problem before it is a cost. The CPSC’s Don’t Swim with Shocks guide lists underwater lights first among the places electricity is found around a pool. It warns that “wet skin or wet surfaces, such as grass or a pool deck, can greatly increase the chance of electrocution when electricity is present.” A light that trips its GFCI means stop swimming, not reset the breaker.
What it costs, part by part
A pool light has four parts, and which one failed is the difference between a $200 job and a $2,500 job. The rest of the pad is covered in pool equipment 101.
- The niche is the housing cast into the pool wall. It holds the fixture and is permanently part of the shell.
- The fixture is the sealed light assembly that sits in the niche, held by a single screw at the top, with a long cord coiled behind it.
- The cord and conduit run from the niche through a pipe in the wall to a junction box on the deck, above water level.
- The junction box and circuit, including the GFCI protection, live at the deck or the equipment pad.
The long, coiled cord is what keeps most light jobs cheap. A technician can unscrew the fixture, pull it out of the water, and set it on the deck with the power off, all with the pool full.
| Job | Typical cost | Notes |
|---|---|---|
| Diagnosis and reset of a tripping circuit | $100 to $200 | Often folded into the repair if you proceed |
| Bulb replacement, older incandescent fixture | $150 to $350 | Only worth it if the fixture is sound and you are not converting |
| Gasket and lens reseal | $150 to $300 | The fixture flooded but is otherwise fine |
| Color LED fixture replacement | $450 to $1,500 | The common job. Fixture is most of the cost, labor is one to two hours |
| White LED fixture replacement | $350 to $900 | Cheaper than color, and plenty of pools do not need color |
| Junction box or deck wiring repair | $300 to $900 | Electrician territory, priced by what is found |
| New conduit run or niche repair | $1,500 and up | Requires the pool empty. Do it during a resurface or not at all |
| Adding a light where none exists | $2,500 and up | Core drilling a shell and running new conduit is major work |
Why fixtures cost what they do
People are routinely surprised that the part is $400 to $900. A pool light fixture is a sealed, water-rated, corrosion-resistant assembly with a long factory-terminated cord, built to sit permanently submerged in chlorinated water. The cord alone is a significant portion of the manufacturing cost, and it is sold in specific lengths so the fixture reaches your particular junction box.
Bulb, fixture, or circuit: reading the symptoms
You can often tell whether a dead pool light is the bulb, the fixture, or the circuit yourself, and the answer changes who you should call.
| Symptom | Likely cause | Who fixes it |
|---|---|---|
| Light does not come on, nothing trips | Bulb or failed LED driver | Pool service |
| GFCI trips the moment you switch it on | Water in the fixture, damaged cord, or a wiring fault | Electrician, and leave it off |
| Light works but is dim, yellowed, or hazy | Flooded lens or a clouded gasket | Pool service |
| Colors stick, will not cycle, or the wrong color | Controller sync issue on a color LED | Pool service |
| Visible water inside the lens | Failed gasket, fixture flooded | Pool service |
| Light flickers with other equipment | Circuit or voltage problem | Electrician |
| Breaker off, reason unknown | Somebody turned it off for a reason | Find out before turning it back on |
A GFCI that trips is not being fussy
Ground fault protection on a pool light exists because a fault in a submerged 120 volt fixture can energize the water. When the GFCI trips, it has detected current going somewhere it should not, and that somewhere is potentially the pool. Do not reset it repeatedly, do not swim, and do not let anybody tell you it is a nuisance trip. Turn the breaker off and get it diagnosed. It belongs with the other stop-swimming conditions in is your pool water safe to swim in.
The case for converting to LED
Most pools built here before roughly 2010 have an incandescent fixture, typically 300 or 500 watts. A modern LED replacement draws roughly 30 to 70 watts for equal or better light output.
| Incandescent | LED | |
|---|---|---|
| Typical draw | 300 to 500 watts | 30 to 70 watts |
| Bulb life | About 1 to 2 seasons of regular use | Many years |
| Bulb cost when it goes | $40 to $120 plus labor each time | Fixture replaced as a unit, rarely |
| Color | White only, unless a lens is fitted | Color and effects standard on most |
| Voltage | Commonly 120 volt | Commonly low voltage, which is safer |
| Heat in the niche | Considerable | Minimal |
The running-cost difference between incandescent and LED is small in dollars, because a pool light runs a few hours an evening rather than continuously. At four hours a night through the season, a 500 watt fixture works out to roughly $40 to $60 a year in electricity, against about $5 for the LED. What pays for the conversion is skipping a bulb and a service call every year or two.
The secondary argument is safety. Older 120 volt fixtures are legal where they were installed to code, but low-voltage LED is a better arrangement in a wet environment. Depending on what is being replaced and how, an electrician may tell you the circuit needs to be brought up to current requirements as part of the work, because of how electrical codes treat a modified circuit.
Austin’s tip
A working pool light is a safety feature as much as ambience. A lit pool at night is visible from the house. An unlit one is a dark rectangle in a yard where children and dogs move around after sunset, and lighting is a real part of the layered approach described in drowning prevention layers.
Do it while the pool is empty
The pool light jobs that need a drained pool involve the parts you cannot reach through the water. That means a corroded or damaged niche, a blocked or broken conduit, or a cord that will not pull because something in the wall has collapsed.
Draining a pool in Collin County clay is not a casual undertaking, for the reasons in draining a pool here. So if you are already having the pool resurfaced, deal with the light in the same window even if it currently works. Adding a light, replacing a niche, or running new conduit costs a fraction of what it does as a standalone job with a drain attached. The rest of that same-window checklist is in the resurfacing guide.
What to ask when you get a quote
- Is the niche and conduit sound? A failed niche or conduit turns this from a $700 job into a $3,000 job, and it should be checked before a fixture is ordered.
- What cord length, measured how? The fixture has to reach the junction box with the coil intact. This gets guessed, especially on fixtures bought online, and then gets returned.
- Is the replacement low voltage or 120 volt? And if the answer is 120 volt, why.
- Does it work with my existing switch or automation? Color LED fixtures cycle colors by counting power interruptions, so they need to be compatible with whatever controls them or you get the wrong color permanently.
- Who is doing the electrical portion? Fixture swaps are pool service work. Junction boxes, circuits, and anything that trips a GFCI are an electrician’s. A company that blurs that line is worth a second opinion.
- What is the warranty on the fixture and on the labor? Separately, because they are usually different.
Our own line is the same one. We pull and replace pool light fixtures and tell you honestly whether you have a fixture problem or a circuit problem. We do not do the circuit: the junction box, anything that trips a GFCI, and any new or upgraded line are licensed electrical work. Who holds that license is one of the eleven questions in how to choose a pool service.
If you want the light looked at rather than guessed at, book an equipment inspection. It starts with the GFCI rather than the bulb.
