AFI Spotlight Bulb

AFI Spotlight Bulbs: Genuine Marine-Grade Illumination

When you're navigating after dark or scanning an anchorage in heavy weather, a reliable spotlight isn't a luxury — it's a safety tool. AFI (also marketed under the Marinco umbrella) has long been a trusted name in marine electrical hardware, and their spotlight bulbs reflect the same engineering philosophy that makes the brand a staple aboard cruisers, powerboats, and commercial vessels alike.

What Makes AFI Spotlight Bulbs Stand Out

AFI's spotlight bulb lineup centers on purpose-built halogen replacements engineered specifically for the demands of on-water use. The halogen spotlight bulbs deliver bright, vibrant white illumination and are built to a "rough service" standard, permitting hours of reliable burning even under the vibration and shock common in marine environments.

Available in both 12V and 24V configurations, AFI's replacement halogen spotlight bulbs are designed for use with Marinco's SPL-12 series spotlights , making them a natural go-to choice for boaters who need a direct, manufacturer-specified replacement rather than a generic substitute. The H3 halogen format — a 100W H3 halogen design rated for 12-volt systems — is the workhorse of the lineup, offering a strong, focused beam that holds up in fog, rain, and open-water darkness.

AFI/Marinco's spotlight systems are built around a universal 12/24V circuit with a bright 100W H3 halogen bulb, UV-resistant IP56 weatherproof housing and Lexan® lens, and an O-ring sealed enclosure designed specifically for the harsh marine environment. Choosing a genuine AFI replacement bulb means the optical and electrical specs are matched to that sealed system from the start.

Designed for Real Marine Conditions

AFI/Marinco was built through a combination of worldwide engineering expertise to produce an internationally recognized electrical components manufacturer focused on excellent quality products for harsh environments. AFI products undergo rigorous testing and are often backed by generous manufacturer warranties, giving boaters confidence that the hardware is built to high standards and ready for tough conditions.

Whether you're replacing a burned-out bulb after a long night passage or stocking a spare aboard before a coastal cruise, having the right AFI spotlight bulb on hand means your searchlight is back in action with minimal downtime. The clean, direct swap design means no custom wiring or adapter work — just drop in the correct voltage variant and you're back on watch.

Choosing the Right AFI Spotlight Bulb

• Match your voltage: AFI offers both 12V and 24V variants — confirm your vessel's electrical system before ordering.
• Confirm your fixture series: AFI's replacement bulbs are specified for the SPL-series spotlight housings; check your existing fixture model number.
• H3 halogen format: The standard H3 base style provides wide compatibility and strong, focused output suited to open-water spotting.
• "Rough service" rated: The compact halogen design is built to deliver bright, vibrant white illumination and withstand the demanding conditions of marine spotlight use.

Browse the full spotlight bulb category to find the right voltage and specification for your vessel, or explore the complete AFI brand page for wiper motors, horns, and other marine electrical essentials from one of the industry's most seasoned manufacturers.