Product Overview

The Pentair Amerlite 78447100 is a full-size underwater incandescent pool light designed to provide bright, dependable white illumination for residential and commercial swimming pools.

This model uses a 400-watt white incandescent lamp, operates on 120 volts, and includes a factory-installed 150-foot cord. The longer cord is ideal for pools where the approved junction box or electrical connection point is located farther away from the light niche.

Amerlite lights feature a durable stainless-steel shell, a stainless-steel face ring, Pentair’s Uni-Tension clamp system, and a prismatic tempered-glass lens that helps distribute light evenly throughout the pool. The fixture is designed for installation in compatible full-size Pentair and legacy American Products, PacFab, and Purex wet niches.

Key Features

• Genuine Pentair Amerlite underwater pool light
• Bright white incandescent illumination
• 400-watt lamp
• 120-volt operation
• Factory-installed 150-foot cord
• Full-size underwater pool-light fixture
• Stainless-steel housing
• Stainless-steel face ring
• Prismatic tempered-glass lens
• Uni-Tension clamp assembly
• Heat-sensing low-water cutoff protection
• Serviceable incandescent lamp design
• Compatible with select Pentair and legacy full-size niches
• Optional colored lens covers available separately
• Designed for residential and commercial swimming pools

Benefits

• Produces strong, traditional white underwater lighting
• Long 150-foot cord supports installations farther from the junction box
• Stainless-steel construction provides durability in underwater environments
• Prismatic lens improves light diffusion throughout the pool
• Serviceable design allows the lamp to be replaced
• Compatible with many existing full-size Amerlite-style niches
• Thermal protection helps protect the fixture if the water level is too low
• Proven lighting platform used in pool installations for many years
• Suitable for replacing a compatible existing Amerlite fixture

Specifications

Compatible Niches

The Pentair Amerlite 78447100 is designed for installation in compatible full-size wet niches, including select:

• Pentair niches
• American Products niches
• PacFab niches
• Purex niches
• Existing full-size Amerlite installations

Compatibility must be confirmed using the existing niche manufacturer, niche model, fixture dimensions, mounting screw position, voltage, and electrical system.

Do not order this fixture based only on the appearance of the existing pool light.

What Is Included

• One Pentair Amerlite underwater light fixture
• 400-watt white incandescent lamp
• Stainless-steel face ring
• Prismatic tempered-glass lens
• Factory-installed 150-foot electrical cord
• Factory-assembled housing and clamp components

The following items are not included unless specifically stated:

• Wet niche
• Junction box
• Electrical conduit
• Transformer
• Automation controller
• Colored lens covers
• Replacement gasket
• Installation labor

Installation Information

The Pentair Amerlite 78447100 must be installed by a qualified pool professional and licensed electrician according to Pentair instructions, the National Electrical Code, and all applicable local codes.

Before installation:

1. Disconnect electrical power at the circuit breaker.
2. Confirm the circuit supplies 120 volts.
3. Verify the existing niche is approved and compatible.
4. Confirm the 150-foot cord is sufficient to reach the approved junction box.
5. Inspect the niche, conduit, bonding connection, and mounting screw.
6. Verify GFCI protection is installed and operating correctly.
7. Confirm all grounding and bonding requirements are satisfied.
8. Route the factory cord without cutting or underwater splicing.
9. Leave sufficient cord in the niche to allow the fixture to be placed on the deck for future service.
10. Test the completed installation according to code before use.

Never operate the light for an extended period outside the water. The fixture relies on surrounding pool water for cooling.

Confirm Before Ordering

• Confirm Pentair part number 78447100.
• Verify a 400-watt white incandescent light is required.
• Confirm the electrical system operates at 120 volts.
• Verify a 150-foot factory cord is needed.
• Confirm compatibility with the existing full-size wet niche.
• Do not confuse this model with shorter 50-foot or 100-foot cord versions.
• Do not confuse it with 500-watt Amerlite models.
• Verify the mounting screw and niche dimensions.
• Confirm the junction-box distance before selecting the cord length.
• Inspect the existing niche and conduit for corrosion or damage.
• Confirm that an incandescent fixture is permitted for the intended installation.
• Have the light professionally installed and electrically tested.

Warranty Information

This genuine Pentair lighting product is covered under Pentair’s applicable limited manufacturer-warranty terms.

Warranty eligibility may depend on purchase through an authorized Pentair dealer, professional installation, correct voltage, compatible niche installation, proper bonding and grounding, and compliance with Pentair installation requirements.

Damage caused by incorrect voltage, improper wiring, damaged conduit, unauthorized cord modification, underwater splicing, improper gasket installation, water intrusion, operation outside the water, or incompatible niche installation may not be covered.

Keep the original purchase receipt and professional installation invoice for warranty service.

Customer Q&A

Is the Pentair 78447100 an LED light?
No. This model uses a traditional 400-watt white incandescent lamp.

What voltage does this light require?
It requires a 120-volt electrical supply.

How long is the cord?
The fixture includes a factory-installed 150-foot cord.

What size is the fixture?
It is a full-size Amerlite pool light with an approximately 10-inch face-ring diameter.

Does it include the wet niche?
No. The wet niche is sold separately unless specifically included in a package.

Will it fit every Pentair niche?
No. It is designed for compatible full-size niches. The existing niche model and dimensions must be confirmed before ordering.

Can the incandescent lamp be replaced?
Yes. Amerlite fixtures are serviceable, and the lamp can be replaced when the fixture is correctly removed and resealed by a qualified professional.

Can the cord be shortened or spliced?
The factory-installed underwater cord should not be spliced. Select the correct cord length before ordering and follow all Pentair and electrical-code requirements.

Can this fixture be operated outside the water?
It should not be operated for an extended period outside the water because the pool water helps cool the fixture.

Is professional installation required?
Yes. Underwater pool lighting involves high-risk electrical work and should be installed by a licensed electrician or qualified pool professional.