Hayward AstroLite LED Upgrade: Stop Buying Bulbs for the Old Workhorse

Hayward's AstroLite is the other giant of the classic pool light era. Alongside the Pentair Amerlite, it lit a huge share of American inground pools built over the past few decades, and it shares the same weakness: a hot incandescent flood bulb that has been known to burn out every few seasons and take the lens gasket's best years with it. Here is how to identify an AstroLite and what upgrading it to LED looks like.

Identifying the AstroLite Format

From the deck, the AstroLite reads almost identically to its Pentair cousin: a large round fixture roughly 10 inches across with a stainless face ring, a single securing screw at the top of the ring, and a tab engagement at the bottom. It lives in a large wet niche built into the pool wall, with extra cord coiled behind it so the fixture can float up to the deck for service.

Full-size AstroLite pool lights commonly appear under part numbers in the SP0580 series, such as SP0583 for common 120V configurations, and your fixture or paperwork may carry one of these numbers on a sticker or stamp. If your light is the smaller spa version, often called AstroLite II, it belongs in the compact spa niche family instead, and our 6 inch spa niche collection is the place to look.

The Familiar Bulb Problem

Like every incandescent-era pool light, the AstroLite runs a 300W to 500W flood bulb behind a sealed glass lens. The bulbs tend to last one to three swim seasons of nightly use, and each replacement means opening the lens, fitting a fresh gasket, and resealing without error. Owners who have done the ritual a few times know the stakes: a reseal that does not seat perfectly lets water in, and water inside the fixture usually means buying a whole new light anyway.

The full cost comparison between staying on bulbs and converting to LED lives in Pool Light Burned Out? Replace It with LED Instead of Another Bulb, and the numbers land the same for Hayward owners as for Pentair owners: the conversion tends to pay for itself within a season or two on electricity alone.

The Drop-In LED Upgrade

Because the AstroLite lives in the standard large wet niche format, the same drop-in path applies: a sealed 10 inch LED fixture installs in the niche your AstroLite occupies today, secures with the same screw-at-top pattern, and connects at the same junction box. No bulb to change, no gasket to buy, a 50,000 hour rating, and full RGB color plus clean bright white that the original could never produce.

One electrical note: our 10 inch LED replacement runs on 12V AC, while classic AstroLite installs are frequently 120V. In that case the conversion includes adding a compact 12V transformer at the equipment pad, a quick job for the electrician who is already handling the junction box connection, and modern pool safety practice favors 12V at the fixture anyway. Our Smart WiFi Pool Light Transformer covers it and adds app, voice, and remote control of your pool light at the same time. If your AstroLite is already a 12V model, the light is a direct swap.

The swap is the standard 30 minute, no-drain job we walked through in Can You Replace a Pool Light Without Draining the Pool? Power off at the breaker first, and if the junction box wiring looks unfamiliar, hand that step to a licensed electrician.