LED Pool Lighting Conversion for 1990s Alpharetta Pools

Your Windward or Deerfield pool was built between 1994 and 2003. The niches still hold water. The wet-side bulbs still light the pool. And every single one of those fixtures is a 400-watt incandescent space heater masquerading as a swimming pool light — silently burning a hole through your Georgia Power bill every evening the pool runs.

That is the quiet problem we get called about more than any other single item in Alpharetta’s established subdivisions. Homeowners in Country Club of the South, Hutchinson Farm, White Columns, Haynes Manor, and Ashebrooke call us because a bulb blew, a transformer hummed itself to death, or the pool looks yellow and tired next to a neighbor’s newly-built pool glowing in 14 programmable colors. Then we walk the deck, pop the deck box, count the fixtures, and deliver the number: your three incandescent fixtures are costing you roughly $360 to $540 a year to run at 1,200 combined watts. The LED retrofit pays itself back in 3 to 4 years. After that, the savings keep coming for another decade.

This is a conversion post, not a pool-lighting overview. If you own a pool built between 1990 and 2005 inside the 30004, 30005, 30009, or 30022 ZIP codes, the next 2,800 words are written specifically for the niche, conduit, and transformer you already have sitting in your backyard right now.

1. Why 1990s Alpharetta Pools Still Run Incandescent — and What It Actually Costs You

Incandescent pool lighting was the industry default from the 1970s straight through the early 2000s. The dominant fixtures were the Pentair Amerlite (300W and 500W variants) and the Hayward Astrolite (300W-500W). Both sit in a standard large niche, both feed off 120V line voltage, and both light a pool by brute-forcing a tungsten filament inside a pressure-sealed lens. They glow warm. They glow fine. They also throw 80 to 90 percent of their electrical draw as heat directly into the pool water instead of as light. That is not a figure of speech — it is how incandescent physics works.

Run the math on a typical three-fixture Windward or Country Club of the South pool. Three 400W incandescents pulling roughly 1,200W total. If the pool owner runs evening light for four hours a night, roughly 240 nights of the year (the useful swim-season-plus-ambient-evening window), that is 1,152 kilowatt-hours annually. At Georgia Power’s residential rate of approximately $0.13 per kWh after all riders, you are looking at $150 a year just in fixtures — before you factor in bulb replacements at $35-$65 each plus the labor to dive the pool and swap them.

Now compare the retrofit. A Pentair IntelliBrite 5G Color LED or a Hayward ColorLogic 4.0 LED draws 55 to 70 watts per fixture at comparable or brighter lumen output. Three retrofitted fixtures draw roughly 195W total instead of 1,200W. Same four hours, same 240 nights, same rate: about $24 a year. The delta per pool is $120 to $180 per fixture per year, and the bulbs are now rated for 30,000+ hours instead of the 5,000-hour incandescent standard. You replace them roughly never.

2. The 6-Step Retrofit Process We Run on Every 1990s Alpharetta Pool

This is the exact sequence our crew walks through when a homeowner in Ashebrooke or Hutchinson Farm calls for an LED conversion. No shortcuts, no “we’ll see when we get there” — the process is the same whether the pool has one fixture or five.

Step 1 — Deck box and conduit audit. Before we quote anything, we pull the deck junction box and trace the conduit run from box to niche. Alpharetta pools from the 1990s were almost always built with 1-inch PVC conduit and a full 8 feet of excess cord stuffed behind the niche, which was the code at the time. That excess is how the fixture comes out. If someone sealed the niche with hydraulic cement or cut the excess short during a previous repair, the retrofit scope changes immediately. We want to find that out on day one, not on installation day.

Step 2 — Niche condition and gasket inspection. We check the niche shell for corrosion around the stainless mounting points, inspect the bonding lug, and look hard at the conduit-hub seal. A 1995 niche with a still-intact bonding lug and no pinhole corrosion is a 30-year niche. We reuse it. A niche with heavy crevice corrosion near the waterline gets flagged for replacement, which moves the job from a retrofit to a plaster-repair-and-reset and changes the math.

Step 3 — Fixture selection and color-temperature match. For Alpharetta homeowners running a Pentair IntelliCenter or EasyTouch automation system already, we spec the Pentair IntelliBrite 5G — 55W draw, 14-color programmable. For Hayward OmniLogic or ProLogic systems, we spec the Hayward ColorLogic 4.0 LED. Mixing brands on the automation side creates driver-protocol issues we refuse to leave a customer with.

Step 4 — Power-down, lock-out, and extraction. Breaker off at the sub-panel, transformer de-energized, lock-out tag-out. We pull the old incandescent fixture, cut the cord at the deck box splice, and feed the new LED cord back through the conduit. The cord on an IntelliBrite 5G is 100 feet standard — plenty for any Alpharetta backyard geometry we have ever measured.

Step 5 — GFCI verification and transformer sizing check. Every retrofit ends with a GFCI trip test, a bonding continuity check, and a confirmation that the existing transformer (if you had a 12V fixture instead of a 120V) is still sized correctly for the new LED load. Most 1990s Alpharetta pools ran 120V incandescents, which simplifies this step. If yours ran a 100W 12V fixture off a step-down transformer, we test the transformer for voltage drop under LED load and replace it if drop exceeds acceptable thresholds. LEDs are sensitive to voltage — an oversized transformer that worked fine with a 100W incandescent can shorten LED life dramatically.

Step 6 — Programming and homeowner handoff. We program the IntelliBrite show modes (SAm, Party, Romance, Caribbean, American, plus seven fixed colors), sync them across multiple fixtures so they shift colors in unison, and hand the homeowner a one-page cheat sheet. If the pool has an IntelliCenter app, we pair the lighting scenes to the app. We leave. The pool looks twenty years newer that same night.

3. Cost Breakdown: What a Conversion Actually Runs in Alpharetta

Here is where conversion projects derail. A homeowner reads a national average online that says “pool LED retrofit: $250” and assumes the retail price of the fixture equals the installed price. It does not. The fixture is one line item. The labor, bonding verification, transformer check, and permitting (when required) are the rest of it.

Our installed range for a straightforward retrofit where the existing niche and conduit are reusable: $480 to $720 per fixture. That includes the IntelliBrite 5G or ColorLogic 4.0 LED itself (roughly $280-$420 at current distributor pricing), roughly 2.5 to 3.5 hours of labor per fixture for extraction/feed/programming, GFCI and bonding testing, and a one-year workmanship warranty on top of the manufacturer’s fixture warranty.

The numbers scale like this for typical Alpharetta pools:

• 1-fixture small pool (18×36 rectangle): $480-$720 installed. Annual savings $120-$180. Payback 3-4 years.
• 2-fixture mid-size pool (standard Deerfield or Haynes Manor build): $960-$1,440 installed. Annual savings $240-$360. Payback 3-4 years.
• 3-fixture Windward or Country Club of the South pool: $1,440-$2,160 installed. Annual savings $360-$540. Payback 3-4 years.
• 4-5 fixture luxury build (Avalon-adjacent infill): $1,920-$3,600 installed. Annual savings $480-$900. Payback still 3-4 years — LEDs scale linearly with fixture count.

Jobs that require niche replacement, conduit re-pulls through collapsed runs, or new transformer installation move outside these ranges. We will tell you upfront during the audit whether your specific pool lands in the straightforward retrofit bucket or the scope-expansion bucket.

4. The Alpharetta-Specific Permitting and Utility Coordination Piece

This is where Alpharetta differs from unincorporated Fulton County, Johns Creek, or Milton — and it is one of the real advantages of doing the retrofit inside the city limits. Alpharetta’s Community Development office at 2 Park Plaza handles in-city permits directly, rather than routing them through Fulton County permitting, and their calendar runs noticeably tighter. For a like-for-like fixture retrofit (same voltage, same fixture location, existing bonding intact) no permit is typically required. For any job that modifies the electrical service, replaces a transformer, or adds a fixture where there was not one previously, an electrical permit is pulled and inspected before the pool goes back into service.

If your home sits in the Windward or Cambridge Parks area, Georgia Power is your utility and their service-drop coordination is predictable. A small slice of northern Alpharetta — especially properties along the Milton border — sits under Sawnee EMC instead. The inspection calendar is different, and we have learned the hard way to confirm which utility serves the address before committing to a completion date. Sawnee’s turnaround on any service-tie work tends to run a few days longer than Georgia Power’s.

HOA architectural review is the other Alpharetta-specific factor. Windward and Country Club of the South both run active ARBs with 3 to 4 week turnarounds on anything visible. A fixture retrofit that does not change the deck footprint or the visible fixture trim is usually waived through with a courtesy notification — but we submit the notification anyway, because an ARB that gets called after the fact is an ARB that makes the next homeowner’s life harder.

5. What Goes Wrong When Retrofits Are Done Cheap — and How to Avoid It

We get called to fix more failed LED retrofits than we like. The failure modes are predictable and they trace back to three mistakes.

Mistake one — cord splicing inside the niche. Someone cuts the LED cord short to make the pull easier, then splices it inside the niche with a wire nut and silicone. Water finds the splice within 18 months, the GFCI starts tripping on rainy evenings, and eventually the fixture fails. The fix is to pull another 100 feet of new cord the right way. The IntelliBrite 5G ships with 100 feet precisely because the cord is supposed to terminate at the dry deck box, never at the wet niche.

Mistake two — skipping the bonding verification. The bonding lug on a 1990s niche was installed correctly, but corrosion or a previous repair may have compromised continuity to the equipotential bonding grid. An LED retrofit is a perfect moment to verify continuity with a meter and re-bond if needed. Skip it, and you carry a code violation forward into a fixture that may outlast the rest of the pool.

Mistake three — mismatched automation protocols. A Hayward ColorLogic fixture wired into a Pentair IntelliCenter controller will light, but it will not sync show modes or hold programmed scenes reliably. The cross-brand incompatibility surfaces as “the lights sometimes do the wrong color” six months later, after the warranty window is thinner. We match fixtures to the existing automation brand every time. If the pool has no automation and the homeowner wants color programming, we spec a standalone controller that matches the fixture brand.

Done correctly, a retrofit on a 1995-era pool will carry the lighting system another 15 to 20 years. Done wrong, you are paying for the same job twice inside three seasons. The difference is roughly $150-$200 of labor and inspection time per fixture — a rounding error on a project whose payback is measured in years, not decades.

If you own an incandescent-era pool in Alpharetta and you have been putting this off because you assumed it was a teardown job, it is not. In 95 percent of the pools we audit in the 30004, 30005, 30009, and 30022 ZIP codes, the existing niche and conduit are entirely reusable. The rest is fixture swap, programming, and handing you a pool that looks twenty years younger and draws roughly 84 percent less power every night it runs.