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PENTAIR AMERLITE 78458100 INCANDESCENT POOL LIGHT – 120V, 500W, 50 FT CORD, STAINLESS STEEL FACE RING
Model: Amerlite with Stainless Steel Face Ring – 500 Watt, 120 Volt, 50 ft cord
Part Number/SKU: 78458100
Application: Pool
Voltage: 120V
Wattage: 500W
Light Type: Incandescent (R-40 lamp)
Light Color: White
Cord Length: 50 ft
Face Ring: Stainless steel with uni-tension clamp
Niche Type: Full-size wet niche (niche sold separately)
Compatibility: Full-size Pentair, American Products, PacFab and Purex niches; GFCI-protected 120V circuit
The Pentair Amerlite 78458100 is the 120-volt, 500-watt version of Pentair's Amerlite underwater incandescent pool light, supplied with a 50-foot cord and a stainless steel face ring. It is the classic full-size wet-niche fixture: a stainless steel shell, an 8-3/8 inch prismatic tempered glass lens that spreads light evenly across the pool, and a uni-tension clamp on the face ring that holds the assembly in the niche. The lamp can be changed without lowering the water level.
This is a white-light fixture using an R-40 incandescent lamp per Pentair's owner's manual. Because it is a 120-volt luminaire no transformer is needed, but it must be connected to a GFCI-protected branch circuit. A heat-sensing low-water cutoff protects the fixture if the water level drops below the lens.
The Amerlite is UL Listed for installation in full-size Pentair, American Products, PacFab and Purex niches and is certified for fresh water with up to 6,000 ppm salinity. Optional snap-on colored lens covers (blue, red, green, amber) and plastic snap-on face rings are available separately. Unlike the 100 W and 300 W Amerlites that Pentair has marked obsolete under DOE rules, the 500 W / 120 V models remain in Pentair's current 2025-2026 catalog. This is a TradeGrade product: Pentair's full warranty applies through a TradeGrade-compliant dealer, and online sales carry a 60-day limited warranty.
Key Features
- 120V, 500W white incandescent underwater pool light with 50 ft cord
- Stainless steel shell and face ring with uni-tension clamp
- 8-3/8 in prismatic tempered glass lens for even light distribution
- Heat-sensing low-water cutoff; lamp changes without lowering the water
- UL Listed for full-size Pentair, American Products, PacFab and Purex niches
- No transformer required – GFCI-protected 120V circuit
- Current Pentair part (2025-2026 catalog)
Specifications
| Specification | Details |
|---|---|
| Brand | Pentair |
| Part Number/SKU | 78458100 |
| Model | Amerlite with Stainless Steel Face Ring – 500 Watt, 120 Volt, 50 ft cord |
| Product Type | Incandescent Underwater Pool Light |
| Application | Pool |
| Voltage | 120V |
| Wattage | 500W |
| Light Technology | Incandescent (R-40 lamp) |
| Light Color | White |
| Cord Length | 50 ft |
| Face Ring / Finish | Stainless steel with uni-tension clamp |
| Niche Type | Full-size wet niche (niche sold separately) |
| Niche Compatibility | UL Listed for full-size Pentair, American Products, PacFab and Purex niches |
| Dimensions | 8-3/8 in prismatic tempered glass lens |
| Warranty | Full Pentair warranty when purchased through a TradeGrade-compliant dealer; 60-day limited warranty if sold online (Pentair TradeGrade policy) |
What's Included
- Amerlite 120V / 500W light fixture with 50 ft cord and stainless steel face ring
- Not included: niche, junction box, colored lens covers
The Amerlite 78458100 is the straightforward like-for-like replacement for a 120-volt, 500-watt incandescent light in an existing full-size wet niche, with a 50-foot cord to reach the junction box.
Learn more at Pentair:
https://www.pentair.com/en-us/pool-spa/products/lighting/amerlite-underwater-incandescent-lights/sku/78458100.html
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