Product Overview

The Pentair Amerlite® 78448100 is a full-size underwater incandescent pool light that has been a trusted standard in residential and commercial pool lighting for decades. Designed for installation in compatible full-size wet niches, this 10-inch pool light delivers bright 400-watt white illumination and operates on 120 volts.

Featuring a stainless steel face ring, durable stainless steel housing, and an 8-3/8-inch prismatic tempered glass lens, the Amerlite is engineered for long-lasting underwater performance. The integrated Uni-Tension™ clamp simplifies installation and servicing while helping provide a secure fit in compatible Pentair, American Products, PacFab, and Purex niches.

This model includes a factory-installed 50-foot cord, making it ideal for equipment pads located close to the pool. Amerlite lights are UL listed for freshwater pools with salinity levels up to 6,000 ppm.

Key Features

• Genuine Pentair Amerlite® underwater pool light
• Part Number: 78448100
• Full-size 10-inch pool light
• 400-watt white incandescent lamp
• 120-volt operation
• Factory-installed 50-foot cord
• Stainless steel housing
• Stainless steel face ring
• Uni-Tension™ clamp mounting system
• 8-3/8" prismatic tempered glass lens
• Fits compatible Pentair, American Products, PacFab, and Purex niches
• UL listed for underwater installation
• Certified for freshwater pools up to 6,000 ppm salinity

Benefits

• Bright white underwater illumination
• Proven Amerlite reliability and performance
• Durable stainless steel construction resists corrosion
• Compatible with many existing Pentair and legacy niches
• Factory-installed cord simplifies installation
• Serviceable incandescent lamp design
• Excellent replacement for existing Amerlite fixtures
• Suitable for residential and commercial pool applications

Specifications

Installation Information

The Pentair Amerlite 78448100 must be installed by a qualified pool professional or licensed electrician in accordance with the National Electrical Code (NEC), local electrical codes, and Pentair installation instructions.

Before installation:

• Verify the electrical supply is 120 volts.
• Confirm a compatible full-size wet niche is already installed.
• Ensure the 50-foot cord is sufficient to reach the junction box.
• Verify proper bonding, grounding, and GFCI protection.
• Inspect the niche and conduit for damage before installing the new fixture.

Never energize the light unless it is completely submerged in water.

Confirm Before Ordering

• Confirm Pentair part number 78448100.
• Verify the existing light is a full-size Amerlite-style fixture.
• Confirm 120V electrical service.
• Verify a 50-foot cord is required.
• Confirm compatibility with the existing wet niche.
• Do not confuse this model with the 500-watt Amerlite versions.
• Verify the required cord length before ordering.
• Professional installation is recommended.

Warranty Information

This genuine Pentair lighting product is covered under Pentair's applicable limited manufacturer warranty.

Warranty eligibility may depend on purchase through an authorized Pentair dealer, professional installation, proper electrical installation, and compliance with Pentair's installation requirements.

Damage caused by incorrect voltage, improper installation, water intrusion due to improper sealing, freeze damage, misuse, or unauthorized modification is not covered.

Retain your original purchase receipt and installation documentation for warranty service.

Customer Q&A

Is this an LED light?
No. The 78448100 is a traditional 400-watt white incandescent pool light.

What voltage does it require?
It operates on 120 volts.

How long is the cord?
This model includes a factory-installed 50-foot cord.

Will it fit my existing Pentair niche?
It is designed for compatible Pentair full-size niches and many legacy American Products, PacFab, and Purex niches. Always verify niche compatibility before ordering.

Can this light be used in a saltwater pool?
Yes. Pentair certifies Amerlite lights for freshwater pools with salinity levels up to 6,000 ppm.

Can I replace this with an LED fixture later?
Many retrofit LED options are available for compatible Amerlite niches, but compatibility should always be verified before purchasing.