Salt Air Is the Design Constraint Here
Painted aluminum is the default housing material in the big-box and builder-grade lighting world, and it is the wrong choice near Galveston Bay. Aluminum in a marine environment pits and blooms wherever the powder coat is chipped, scratched by a string trimmer, or breached at a threaded joint, and once corrosion starts under the coating it spreads beneath the finish where you cannot see it. The result is a housing that looks acceptable at ten feet and crumbles when a technician tries to open it.
We specify solid cast brass and spun copper for League City work, without exception on anything within a mile or so of open water. Neither metal rusts. Both develop a patina — copper moves toward brown and eventually green, brass toward a soft chocolate — and that patina is a protective layer rather than a defect. Homeowners who want the bright factory finish preserved should know that no coating holds that look outdoors on the bay, and we would rather say so before installation than after.
The hardware matters as much as the housing. Stainless mounting screws, stainless stakes or brass stakes rather than plated steel, and silicone or marine-grade gaskets at every lens seal. A brass fixture hung with plated steel screws still fails; the screws seize and rust-jack the lens frame, and in three years the fixture cannot be serviced at all.
