LED pool lights use a fraction of the power of old incandescent and halogen pool lights. They also last many times longer, and plenty of North Texas pools still have the old kind. Before you buy one, though, you need to know your system’s voltage and your niche. How the light gets switched matters too.
Pool lights get real use around DFW. Triple-digit afternoons push swimming into the evening, and summer cookouts in Allen or Frisco run well past dark.
LED Pool Light vs Incandescent and Halogen
Pentair didn’t sell its first LED pool light until 2007, so most older pools in the Metroplex came with an incandescent or halogen light. Halogen is a type of incandescent bulb, and both make light by heating a filament until it glows. That’s the weak spot. The Department of Energy says incandescent bulbs give off 90% of their energy as heat. LEDs give off very little.
What the Watts Mean on Your Electric Bill
Jandy is one of the big pool equipment makers. It says LED pool lights need only 18 to 65 watts to match the light of a 300-watt incandescent. That works out to as much as 87% less energy. For home lighting in general, the DOE puts the savings at at least 75% less energy than incandescent lighting.
Run the numbers for a summer night. A 300-watt light burns 1.2 kWh in four hours. A 42-watt LED, the size Jandy uses in its own example, burns about 0.17 kWh in that time. Over a year of nightly use, that’s roughly 438 kWh versus 61 kWh. At 15 cents per kWh, the same rate Jandy uses, the old light costs about $66 a year to run and the LED about $9.
Most people don’t run the light every night, so your real savings will be smaller. If the light only comes on for the Fourth of July, energy savings alone won’t pay for an upgrade. In that case we’d wait until the old bulb burns out.
Why Heat Kills the Old Lights
Because an incandescent or halogen light runs so hot, it depends on the pool water around it to stay cool. Switch one on while it’s out of the water and the heat can crack the lens in seconds. LEDs run much cooler, which is part of why they last longer. Draining the pool for a cleaning or resurfacing? Keep the light breaker off until the water is back over the fixture.
How Long Do LED Pool Lights Last?
Blue Square Manufacturing, a pool light maker, rates incandescent pool lights at about 1,000 hours. Halogen gets 2,000 to 4,000 hours. LED pool lights land at 25,000 to 50,000 hours, and that gap is the real reason to switch. At four hours a night, an incandescent bulb’s 1,000 hours are gone in about eight months of nightly use.
Even the low end of an LED rating is 25 times the life of an incandescent pool light.
Source: Blue Square Manufacturing, a pool light maker. The Department of Energy also puts LED life at up to 25 times that of incandescent lighting.
| Light type | Rated life (hours) |
|---|---|
| Incandescent | About 1,000 |
| Halogen | 2,000 to 4,000 |
| LED | 25,000 to 50,000 |
Rated hours describe the light source, not the whole fixture. In a real pool, something else usually fails first. A lens gasket starts letting water in, a cord cracks, or low pH water corrodes the metal parts. Blue Square says a good LED often gives up to 10 years of reliable light. You can help by keeping pH between 7.2 and 7.8, since water below that range eats metal. For the rest of the equipment pad, our guide on how long pool equipment lasts covers pumps, heaters and filters.
What North Texas Hard Water Does to the Lens
NTMWD and Dallas tap water is hard, and calcium scale builds up on a light’s lens over the years. Scale forms faster when pH runs high or calcium hardness climbs, so balanced water helps the light too. A light that looks weak may just have a scaled-up lens. Look before you replace anything.
12V vs 120V Pool Lights: Match What You Have
Pool lights come in two voltages. A 120-volt light runs on standard house current. A 12-volt light gets its power from a transformer that steps 120 volts down to 12, according to Hayward. Hayward also says brightness is the same at either voltage. Watts measure the power a light uses, not how bright it is.
So why does voltage matter? Your new light has to match what your system supplies. Put a 12-volt light on a 120-volt circuit and it’s toast. Put a 120-volt light on a 12-volt transformer and it won’t light right. The old fixture’s label lists its voltage and watts, so check it before anyone orders a thing.
Safety rules differ too. The National Electrical Code requires GFCI protection on underwater lights above 15 volts. That covers every 120-volt pool light. Hayward notes that some areas don’t allow 120-volt pool lights at all. Even so, a 120-volt light wired to code is safe. The danger comes from bad wiring and leaks, not from the number on the label.
Will an LED Fit the Niche You Already Have?
Most pool lights sit in a niche, a shell built into the pool wall. The light itself is a separate fixture held in by a single screw. Extra cord sits coiled behind it so a tech can lift it onto the deck. In a wet niche, pool water fills the space around the fixture and keeps it cool.
The catch is that a replacement has to be listed for your niche. Pentair’s IntelliBrite 5G, for example, carried a UL listing only for Pentair, American Products, Purex and PacFab niches. Brand and size both matter, and so does cord length. Pentair sold that same light with cords from 30 feet up to 250 feet. The cord has to reach all the way back to the junction box.
An LED Pool Light Bulb or a Whole New Fixture?
If the old fixture is in good shape, an LED pool light bulb can drop into it. That keeps the old lens, gasket and cord, so it costs less up front. It also keeps every weak spot the old light had. If the cord is cracked or water keeps getting behind the lens, a new bulb won’t fix that. A full LED fixture comes with a new seal and cord. It’s the better call on any light that has leaked before.
Adding Lights Where There Are None
Jandy says a niched light has to be planned while the steel goes into the shell. That makes adding one to an existing pool a remodel-sized job. Jandy’s nicheless lights skip the niche and suit spots like tanning ledges, narrow walls and grottos. If you’re already planning pool remodeling, that’s the time to add a light or move one.
Placement matters as much as the light. A fixture aimed at the patio throws glare across the water, and glare makes it harder to see the bottom. Aim lights away from where people sit. Also, one light can leave the far end of a long or L-shaped pool pretty dim.
Getting Color Changing Pool Lights to Stay in Sync
Color changing pool lights cycle through fixed colors and preset shows. Pentair’s IntelliBrite 5G had five fixed colors and seven shows. Jandy’s Infinite WaterColors lights have 10 preset colors and five shows. Without automation, most color lights step to the next color when you flip the switch off and quickly back on. With two or three lights, that gets old fast. The lights can also drift out of step.
Automation fixes that. With pool automation, one panel runs the lights along with the pump, heater and water features. You can pick colors from your phone. You can also set the lights to come on at dusk and shut off at bedtime. Lights from the same brand as the panel usually connect cleanly. Mixing brands is where sync trouble shows up, so pick the light and the controller together.
If you run a salt pool, check the light’s salinity rating too. Most salt systems run 3,000 to 3,500 ppm. Pentair rated the IntelliBrite 5G for up to 6,000 ppm. If you’re still deciding on salt, our salt water pool vs chlorine guide covers that choice.
Why You Should Never Service a Pool Light Yourself
An underwater light is one of the most dangerous pieces of equipment in a pool. Water and wet skin carry current easily. A damaged fixture can charge the water around it. A swimmer who then touches a ladder or rail can take a shock. That’s why electrical work on a pool belongs with qualified, licensed people.
Swapping a bulb looks simple on video. In practice, it means killing the right breaker and pulling a fixture from underwater. Then someone has to reseal it and test a circuit that sits in your pool. We’d leave it to a pro every time.
What a GFCI Does
A GFCI compares the current going out to the light with the current coming back. If about 5 milliamps goes missing, it cuts the power. That’s well under the 10 to 16 milliamps where most adults can no longer let go of whatever is shocking them. Pools more than 30 years old may not have GFCI protection on the light circuit at all. That covers plenty of backyards in older parts of Richardson and Carrollton. If yours is one, have the circuit checked first.
Bonding is the other half of the job. A copper wire ties the steel in the shell, the ladders and the pump motor together. That keeps all the metal at the same voltage. Never cut or remove a bonding wire to make a repair easier. Poor bonding can also lead to corrosion and staining on metal parts.
When a Spring Storm Trips the Light
North Texas spring storms are hard on pool lights. Wind-driven rain gets into junction boxes in flower beds. Water also finds its way into old cords and worn gaskets. When current leaks out through that water, the GFCI does its job and trips. Leave it off. Don’t keep resetting it, and never swap it for a standard breaker just to get the light working.
Small leaks add up, too. When the pool and spa lights share a GFCI, two fixtures that each leak a little can trip it together. That’s why a breaker may hold with one light on and trip with both.
Storms bring a second rule. Get everyone out of the pool at the first thunder. Then wait 30 minutes after the last lightning or thunder before anyone gets back in. The National Fire Protection Association lists swimming pools among the places to avoid during a thunderstorm.
Signs You Should Stay Out of the Water
Call a pro and keep swimmers out if you notice any of these.
- The light hangs loose out of its niche
- Water or fog shows up inside the lens
- The GFCI trips and won’t reset
- Anyone feels a tingle in the water
Turn the light’s breaker off, and don’t reach into the water to check it. Even a small current can be felt as a tingle.
Is Upgrading to LED Pool Lights Worth It?
If y’all swim after dark most of the summer, yes. The light lasts far longer and uses a fraction of the power. It also opens the door to color and phone control. These are a few common setups, and how we’d call each one.
| Your situation | Our take |
|---|---|
| Old light works, used a few nights a year | Wait until it burns out |
| Old light burned out, fixture and cord in good shape | An LED bulb or fixture listed for your niche |
| Water inside the lens or a tripping GFCI | Leave it off; plan on a new fixture |
| Rusted metal niche | Bigger repair; get it inspected first |
| You want colors on your phone | LED fixtures from the same brand as your automation |
Switching to LED With Southern Pool + Outdoors
When you’re ready, our pool light installation service handles the swap. Before anyone orders a light, our tech checks the voltage your system supplies. The niche and the circuit get a look too. If you want the lights on your phone, we set up automation as well. And if the equipment pad needs more than a light, our pool equipment installations cover pumps, heaters and filters.
We work in Allen, McKinney, Plano, Prosper and nearby towns across North Texas. Call (214) 922-1914, Monday through Friday from 8 AM to 5 PM, or schedule service online.
LED Pool Light Questions From North Texas Pool Owners
These come from Google searches and from Texas pool owners on public forums.
What is the lifespan of LED pool lights?
LED pool lights carry ratings of 25,000 to 50,000 hours. That compares with about 1,000 hours for incandescent and 2,000 to 4,000 for halogen. A leaking gasket, a cracked cord or corrosion usually ends a light before the LEDs wear out. Blue Square Manufacturing says a good LED often gives up to 10 years of light.
Can I replace my old pool light with LED?
Yes, most pools can switch, either with an LED bulb in the old fixture or a full LED fixture. The new light has to match your system's voltage and carry a listing for your niche. A full fixture is the better choice if the old one has ever leaked.
Do pool lights use a lot of electricity?
Old incandescent pool lights do, but LEDs don't. A 300-watt incandescent uses 1.2 kWh in a four-hour night. A 42-watt LED uses about 0.17 kWh. At 15 cents per kWh and four hours every night, that's roughly $66 a year versus $9.
Can a pool light become a shock hazard?
Yes. A damaged underwater light can charge the water around it. That's why code requires GFCI protection on pool lights above 15 volts. If the light is loose or has water in the lens, keep everyone out and call a pro.
How do I get my pool light to change colors?
Most color changing pool lights step to the next color when you flip the switch off and quickly back on. With automation, you pick the color or show from the panel or a phone app, and every light changes together. Lights from the same brand as the panel sync most easily.
We're building a pool in Allen. Is one LED light enough?
It depends on the size and shape of the pool. One light can leave the far end of a long or L-shaped pool pretty dim. Brightness comes from the light's output, not its watts. Aim the lights away from the patio so they don't throw glare.
Is there always water in the light niche in the pool wall?
Yes, in a wet niche the space around the fixture fills with pool water, and that's normal. The water keeps the light cool. The inside of the fixture, behind the lens, should never have water. If you see water or fog in there, turn the light's breaker off.
Should I put an LED bulb in my old fixture or buy a whole LED fixture?
A bulb works if the old fixture, gasket and cord are in good shape. If the fixture has leaked or tripped the GFCI, go with a full LED fixture. It comes with a new seal and cord. Either way, the voltage has to match your system.
Why does my GFCI trip only when the pool and spa lights are both on?
Small leaks from each light can add up. A GFCI trips at about 5 milliamps of missing current. Two fixtures that each leak a little can cross that line together. Water in old cords is a common culprit, and finding it is a job for a qualified tech.
My pool light GFCI tripped and won't reset. What should I do?
Leave it off and call a pro. A GFCI that won't reset means current is leaking somewhere. After a storm, the usual suspect is water in the junction box, the cord or the fixture. Never replace it with a standard breaker to get the light back on.
