Overview

The Hella Marine 178555061 is a 12V, 55W H3 halogen replacement bulb for deck floodlights and search lights that use an H3 (PK22s) base. It is meant for 12V DC lighting circuits and draws about 4.6A at full output, so it is a like for like swap when you are replacing the same voltage and wattage bulb.

This is the bulb only, so any sealing against spray and washdowns comes from the light fixture itself. Before ordering, check the markings on your existing bulb and confirm the fixture calls for a 12V, 55W H3 bulb with the same base style.

Key features

• 12V, 55W H3 halogen bulb for common marine floodlight and search light applications
• H3 (PK22s) base style for the correct fit in fixtures built around this socket and retainer
• Like for like electrical load for 12V circuits, about 4.6A at 55W
• Works as a replacement lamp in lights that use H3 bulbs, including many deck floodlights and search lights
• Simple bulb swap when the filament fails or output drops, with no wiring changes

Compatibility and fit

Match three things on the existing bulb and the light label: base type (H3), system voltage (12V), and wattage (55W). If the fixture calls for a different voltage or wattage, use the correct bulb for that fixture to avoid poor performance or overheating.

Installation and setup

Switch off power at the breaker and let the light cool fully before opening the housing. Remove the old bulb, install the new H3 bulb in the same orientation, and make sure the retainer and electrical connection are fully seated before closing the fixture.

Halogen bulbs run hot, and oils from skin can create hot spots on the glass. Handle the bulb with clean gloves or a tissue, and wipe it down if it is touched before reassembly.

Use cases on board

This bulb is a good match for boats running 12V halogen deck floodlights and search lights where a fast replacement matters for night docking, loading gear, or checking rigging and deck areas after dark. Keeping a spare onboard can save a trip when a filament fails at the wrong time.

Maintenance and care

If you are seeing repeated bulb failures, inspect the fixture for water intrusion, heat damage at the connector, or a loose retainer that lets the bulb vibrate. Cleaning the lens and reflector inside the light housing can also help get the most usable light from a fresh bulb.