300W Flood R-40 6.38" MOL (5.0" Dia.) 12-Volt - NA700



Part # NA700

  5 Average  



Part # NA700

Dimensions 6.75" L x 5" W x 5" D

Alternate Part #'s 79101900, SPX541Z1, 57-555-1010, APC12300M, ELER40FL300-12V, R40FL300/12V, SPG-301-7677, SPP-1271

Product Description


Specially designed to keep your pool well lit this season. Our bulbs are made with thicker filaments and glass to last longer. Heavy duty heat shielding prevents damaging heat build-up and prolongs the bulb's life.

* 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

300 W
12 V
R-40 Medium
Dimension A:
6-3/8 in.
Dimension B:
5 in.

?     Asked on 5/2/2021by Eric Siegel

Our pool/spa and lighting was installed somewhere between 1978-1984 (Northern California, if that matters). Our spa has an 8 inch casing and the bulb and lens is shattered. I have no idea what the Voltage or Wattage is. Any suggestions on how to do determine? Is it safe to go with lower wattage? Is it more likely to be 12v vs 120v from that era?

A  Answered on 5/4/2021 by InyoPools Product Specialist Patrick P.

Hi Eric, You would need to shut off power at the breaker to the pool light and then remove the pilot screw on the front ring of the light. You should then be able to bring the entire sealed fixture up onto your deck. On the back of the light where the cord attaches to the light housing there should be a product label with part #'s if you could take a photo of that label and send back to us then we can determine the proper replacement. To send photos simply click the reply link below and upload.

  • Commented on 5/4/2021 by Product Owner

    There isn't any labeling on it though is evident where there used to be one. There was a plastic pouch but the wording is very faded. I do see 791048. From research it appears to be the SS face Amerlite (https://www.inyopools.com/pool_parts_pentair_amerlite_pool_light.aspx). It appears to have been an incandescent bulb, but it is shattered and stuck in the socket. I don't see a transformer but the circuit breaker shows no rating on it. 120V 400W bulb seems like the right choice.

    • Commented on 5/4/2021 by InyoPools Product Specialist Patrick P.

      Hi Eric, Yes most likely the 400W 120V is what you will require.

?     Asked on 2/16/2021by Inyo Visitor

Is there a color changing LED 12 V option for replacing this light?

A  Answered on 2/17/2021 by InyoPools Product Specialist Hector F.

Hello, yes please see our 12 volt LED pool/spa light options here. Please see their product descriptions as they're only compatible with certain pool/spa light fixtures. 

?     Asked on 9/7/2020by Andrea

Will this bulb work with Hayward SP 580?

A  Answered on 12/18/2020 by InyoPools Product Specialist Hector F.

Hi. Andrea, can you provide us with the specific model number of the pool light or the bulb specifications. The light label on the rear of the light should have the model number and the bulb often times have the specifications printed on the very top of them as well. 

?     Asked on 4/7/2020by Doug

Is this the correct bulb for the Hayward Pool light Fix Mod: SP-581. This fixture was installed in 2002

A  Answered on 4/8/2020 by InyoPools Product Specialist Lennox H.

Hi, Doug. Yes, this is the correct replacement bulb for your model fixture. You will also need the Astrolite Lens Gasket - SPX0580Z2

?     Asked on 6/23/2018by Robert

Will this work cause my glass lens saysH Sp-540-z1

A  Answered on 6/26/2018 by InyoPools Product Specialist Lennox H.

Hi, Robert. This bulb will fit the SP-540-Z1 fixture if it's rated for 12 volts. 

?     Asked on 6/4/2018by Vinnie

What is lumen on this bulb?

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

Hi, Vinnie. This bulb is rated at approximately 3000 lumens.

?     Asked on 5/28/2018by kathy

How do I know who is the manufacturer of my pool light. Is there a universal pool light replacement bulb?

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

Hi, Kathy. There is a sticker on the fixture housing that has the model info. Floodlight bulbs are universal, however, you will need the watts and voltage.

?     Asked on 5/23/2018by Matt

I have a inground pool light that is american products company pool light # f-026194 the boys and watts are completely blank on the housing. Will this light work for this model?

A  Answered on 5/25/2018 by InyoPools Product Specialist Lennox H.

Hi, Matt. Unfortunately, we're unable to confirm using the info provided. 

?     Asked on 8/5/2016by Jon

Hi, I have a philips 300W 12V bulb in a Hayward Fixture SP-506, SP-555, SP-507. Is this the Led replacement?

A  Answered on 8/12/2016 by InyoPools Product Specialist Lennox H.

Hi Jon, This bulb is not a LED bulb, there is not a LED bulb that is compatible with that light fixture.

?     Asked on 6/24/2016by nick

how do I know which bulb to buy for my inground pool? It is a hayward

A  Answered on 6/24/2016 by InyoPools Product Specialist Scott W.

That will fit a Hayward Starlite, Duralite and Astrolite

?     Asked on 6/6/2016by Inyo Visitor

how to install haywood in ground pool light bulb

A  Answered on 6/7/2016 by InyoPools Product Specialist Patrick P.

If you just need to replace your light bulb then watch our Video on How to Replace a Pool Light Bulb If you require replacing the entire light fixture, then please watch our Video on How to Replace a Pool Light Fixture.

?     Asked on 5/25/2016by terry

the label on my pool light reads series 7883xx 7843xx watts 300 volts 12 bulb type R-40. Will this bulb replacement fit? Thank you

A  Answered on 5/25/2016 by InyoPools Product Specialist Patrick P.

Yes you may use this bulb or the 12V Pure Colors LED Bulb

?     Asked on 5/22/2016by Steve

Do you sell the replacement bulbs for Pentair Spectrum Amerlite lamp type EYC P/N 79112400

A  Answered on 5/22/2016 by InyoPools Product Specialist Patrick P.

Hi Steve, Yes we do carry bulbs for the Pentair SAM Light you may view these bulbs at our Pentair SAM Lights Parts Diagram page

?     Asked on 8/9/2015by Orlando

Will this Bulb fit and work with Hayward Astrolite Model # sp0581s15. I think it does but want to make sure.

A  Answered on 8/10/2015 by InyoPools Product Specialist Matt S.

Hello Orlando, yes the Seit NA700 bulb is compatible with the Hayward Astrolite fixture. I recommend confirming your voltage is 12 volts before placing the order.

?     Asked on 6/13/2015by reginald Roberts

Is it 12 vdc or ac. Want to change my 120v to a low voltage system.

A  Answered on 6/14/2015 by InyoPools Product Specialist Matt S.

Reginald, this bulb operates on 12 VAC.

?     Asked on 5/29/2015by Inyo Visitor

Can I replace myself?

A  Answered on 5/29/2015 by InyoPools Product Specialist Patrick P.

Yes you can replace yourself as we have a great guide on How to Replace a Pool Bulb which will walk you through the process.

?     Asked on 1/21/2013by Guest

My bulbs burn out after a few hours of use. What would cause this?

A  Answered on 1/21/2013 by InyoPools Product Specialist Patrick P.

My first guess would be to check the voltage. If you are getting anything more than 12v to the light, it will run hotter and burn out quicker.

?     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.


Review Summary

 (Average 5  out of 5 stars)
3 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews