By Feit Electric Company



Part # NA706

Alternate Part #'s 79102100, SPX504Z7, HAL104042

Product Description


This tandard flood lamp will replace a 500 watt 120v/130v bulb in many common pool lights including the Hayward Astrolite and Pentair Amerlite.  Our bulbs feature thicker filaments and glass along with heat shielding to extend bulb life.

  • R-40 medium base
  • 500 watts
  • 120/130 volt

* Dimensions may vary slightly


Remember when replacing your pool or spa light bulb it is very important to replace the lights lens gasket. After long use, heat, and harsh chemicals, the old gasket is probably compressed, and if it doesn't fail immediately, it might fail before the next bulb change. Click here for Pool Light Lens Gaskets

For additional pool & spa light bulbs

Product Specifications

500 W
120 V
R-40 Medium
Dimension A:
6-9/16 in.
Dimension B:
5 in.

?     Asked on 12/29/2011by Guest

Will this light bulb work on a Hayward Astrolite?

A  Answered on 12/29/2011 by InyoPools Product Specialist Patrick P.

Yes, this bulb does work on Hayward Astrolite, as well as other makes and models of pool lights. The most popular of these lights being Pentair Amerlite, Hayward Starlite, Haward Duralite, and Sta-Rite SwimQuip Lights. Click here for a full listing of our >Pool Light Bulbs & Spa Light Bulbs.

?     Asked on 8/12/2015by Jim

What do i need to change from regular 500 watt bulb to an led bulb.

A  Answered on 8/13/2015 by InyoPools Product Specialist Lennox H.

Hi Jim, You would first need to confirm if your light fixture can use the J&J Electronics LED Pool & Spa Lights. You will also need to replace the lens gasket with the bulb.

?     Asked on 6/3/2016by Inyo Visitor

light bul 120 v 500 watss can I replace for 120v/130 volts

A  Answered on 6/9/2016 by InyoPools Product Specialist Lennox H.

Hi, Yes, This bulb can replace your 120 V 500watt R-40 bulb.

?     Asked on 7/3/2016by Paula Cox

Currently have 500 Watt, 120 volt light (Astrolite SP0583L30). What LED light would be comparable to what I have now. Thank you

A  Answered on 7/5/2016 by InyoPools Product Specialist Alan M.

The Pure White LED Pool Lamp 120V or LED Pool Bulb Color Changing 120V 35W would both work with your existing pool light fixture.

?     Asked on 8/20/2016by Ken

I have an American Products Inground Pool Light with a Cn-5 submersible can. It originally had a 120v 400W bulb that finally burned out. Can I use a 500W replacement Bulb with a new gasket?

A  Answered on 8/25/2016 by InyoPools Product Specialist Lennox H.

Hi Ken, Yes, you can replace the 400-watt bulb with a 500-watt bulb along with the Lens Gasket (79101600).


Est. Repair Time

Less than 1 hr

Tools Needed

Screwdriver, Pliers, Wrench Set

1     0

Pool Light Trips GFCI

Written on 11/11/2020 by Guest

Since I was in the middle of emptying the pool due to chlorine lock, only using 3" chlorine tablets for past eight months, I decided to repair the pool light, water leaked into light shorting the circuit and causing GFCI to trip, did not replace gasket last time I replaced bulb, my bad. Before tackling the job find a few videos to watch to help visualize how to do it!
1. Emptied pool, only because I had to for another reason, there is no need to empty pool to repair the light, the cord should be long enough to put the light on the deck.
2.Turned off breaker to pool electrical and removed light to pool deck
3. Using a 3/8" wrench for bolt head and 7/16" wrench for nut removed retaining ring
4. Used flat blade screwdriver to loosen seal and separate lens gasket from light housing
5. Carefully unscrewed bulb, bulb had hole burned through at base
6. There was corrosion and rust in socket so poured CLR into socket and let soak for 15 minutes rinsed with water, towel dried and left it in the sun to dry for three days while I did tile repair
7. Inspected socket, then using electrical contact burnishing tool to remove oxidation on the bulb contact, installed new bulb, turned on breaker to electrical, turned on light for a few seconds to insure light worked
8. Removed old gasket from lens and cleaned lens
9. Installed new gasket on lens, the gasket is the same on front and back so just install it on the lens
10. Replaced badly misshapen retaining unitension wire, put light housing on the deck with the bulb facing up, put the lens with gasket on housing being sure to center it and make sure half moons on lens are pointed toward bottom of light, place face ring on gasket being sure to center it, make sure the retaining clips are evenly spaced around face ring, place the unitension wire on the clips with the bolt loops facing down, put the bolt into the loop pull loops together with channel locks install washer and nut. Tighten nut until loops touch
11. Install light into pool housing putting slot on bottom of light over the retainer at the bottom of the pool housing, push light flush with pool wall and install the single screw at the top.

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