Part # NA700

Dimensions 6.75" L x 5" W x 5" D

Alternate Part #'s 79101900, SPX541Z1, 57-555-1010, APC12300M, ELER40FL300-12V, HAL104040, 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 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 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 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 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 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.


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