By Pentair Pool Products



Model # 78428100

Warranty 1 Year

Alternate Part #'s PEN78428100

Product Description


Pentair AmerLite

Designed for long life and long runs with minimum maintenance

Enhance your pool's beauty with the world's most reliable, most popular, underwater incandescent lighting. AMERLITE lights have been the world standard of reliability for underwater pool and spa lighting for over 40 years. It features a stainless steel shell, 8-3/8 in. prismatic tempered glass lens, and stainless steel face ring with unitension clamp. AMERLITE is expertly engineered to stand up to moisture, corrosion, and impact, and to provide optimum performance and safety for years to come.

Additional features include:

  • Corrosion-resistant stainless steel face ring with unitension clamp.
  • High-quality stainless steel shell for durability.
  • Clear or medium blue prismatic tempered lens for optimum light diffusion.
  • Tempered glass lens provides optimum diffusion.
  • Heat-sensing low water cut-off device for safety.
  • Optional plastic snap-on face rings available.
  • Optional snap-on lens covers available in red, blue, green, and amber.
  • Available in 100- and 300-watt, 12 volt models and 300- and 500-watt, 120-volt models.
  • One-year warranty


Click here for more Pentair Lights

Product Specifications

Cord Length:
50 ft.
300 W
120 V

?     Asked on 5/10/2015by Judy sports

My pool is probably 40 years old It is concrete. I have tried to get the pool light fixed for the last few summer's. There seems to be a problem with it being so old. Are the lights all about the same size to fit existing light holes? Thanks! also I guess the model number is on the light. I purchased the light bulbs a few years back. And I had to really search for those.

A  Answered on 5/11/2015 by InyoPools Product Specialist Lennox H.

Judy, You'll need to know the model niche and size that you have in order to get the correct replacement light fixture. There are different light fixture size and some light fixtures can't be placed in some niche's.

?     Asked on 6/17/2015by Greg

Hi. I need to replace an old American Products Pool light. Dimensions seem to match unit above. But I wish to know if I need to replace mounting plate in pool or if hole pattern will match my rim. Ameriproducts R-500-DB. (I know I should get the 500 watt model.)

A  Answered on 6/18/2015 by InyoPools Product Specialist Patrick P.

Hi Greg, If your old light is an American Products Light and the dimensions match the dimensions shown here then you could use the Amerlite without the need to replace the mounting plate. Here you can view all of the Pentair Ameriltes.

?     Asked on 8/24/2015by Jeff

I have this light fixture and would like to replace the light bulb with a led bulb. My bulb is 120v 300watt r40.

A  Answered on 8/24/2015 by InyoPools Product Specialist Joe S.

Color Splash LED 3G Pool Lamp, 12V PART#LPLP1RGB12. Color Splash 3G Replacement Multi-Color LED In-Ground Pool Lights offer seven solid colors, multiple color blends and five light shows that can instantly transform the consumer’s pool and spa area into a color-rich paradise. They use an Edison base, so they install easily into the consumer’s existing fixture in just minutes. Plus, Color Splash’s LED technology makes them the most energy efficient and longest lasting of their kind on the market.

?     Asked on 5/28/2018by Chuck Dragna

Hi- Is this product compatible with aqualink?

A  Answered on 5/28/2018 by InyoPools Product Specialist Lennox H.

Hi, Chuck. Yes, this fixture is compatible with the Aqualink controller. 

?     Asked on 6/24/2018by Jeff

On average, how much electricity would a 120V, 300W bulb consume in an hour? I'm trying to prove a point about leaving the light on for days on end.....damm roomates! LOL

A  Answered on 6/27/2018 by InyoPools Product Specialist Lennox H.

Hi, Jeff. To calculate the cost based on your kWh rate, use this formula; Watts ÷ 1,000 = Kilowatts (kW) - Kilowatts (kW) x Hours of Use = Kilowatt Hours (kWh) - Kilowatt Hours (kWh) x kWh rate = Cost of Usage. 


Est. Repair Time

Less than 1 hr

Tools Needed

Screwdriver, wire cutter

2     0

Decided after 35+ years of my 500W $$ eater to go with the LED!

Written on 6/5/2017 by lesis

Pretty simple: splice the new LED fixture's electrical cord to the old
120 volt line; access the old line at the electrical switch outlet and
disconnect from power. Start pulling old line (may need a friend's help)
until new line protrudes; keep pulling until 3' of line is left at the fixture
niche. Then cut off extra line at the switch outlet and re-connect line.
VoilĂ , your pool becomes an extravagant LED light show!!

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