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Thread: Hayward Astrolite Voltage

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    Join Date
    May 2014
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    South Carolina
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    Hayward Astrolite Voltage

    Good afternoon -

    Bought a new home in January and have been slowly figuring out the issues with the pool. I have what I believe to be a Hayward Astrolite 580 Niche Light. The marking on the light housing doesn't have the specific model checked. In trying to figure out why the light wasn't working I pulled the housing and checked voltage. I have 120V in the junction box feeding the light and 9.8v in the light socket of the lamp. Do these lights have a transformer to cut the voltage in-line or in the base of the lamp housing? I'm assuming this is a 12v fixture, but I can't figure out the voltage drop. Whomever changed the bulb last time put a standard 120v flood light bulb in it and that wasn't working. Any assistance is much appreciated!

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    JasonLion's Avatar
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    May 2007
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    Re: Hayward Astrolite Voltage

    I don't know anything about that specific light, but they do make lights with a transformer inside the fixture, as well as transformers that fit inside the junction box.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    May 2014
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    South Carolina
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    Re: Hayward Astrolite Voltage

    Has anyone else had experience with these? Hayward wasn't much help and I don't want to buy a 12v bulb if the fixture is either bad or supposed to be 120v.

    Thanks!
    25,000 Gallon Vinyl Inground, Hayward Pro Series Sand Filter

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    gtemkin's Avatar
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    Jun 2008
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    Re: Hayward Astrolite Voltage

    I don't have any specific knowledge about these lights but the Hayward literature for incandescent and halogen versions infers by a complete lack of of any specifics that they are probably for external transformer applications. That makes your 9.8V reading at the socket kinda strange if the fixture cord is actually being fed 120V. Is there any chance the 9.8V is a false floating voltage measurement because the neutral isn't connected? Not sure how the optional over temp protection works but if it's tripped and not self-resetting, it may have something to do with it. These are grasps in the air ideas.
    21K gal 16' x 40' in-ground pool built 1959, old school with Jacuzzi bronze pump, American Products 24" Sand Filter & Americana Multiport valve, Jandy Lite2 millivolt heater, Coverstar cover, and classic Kreepy Krauly.

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