Introducing the F-THR4-FS-120: The Most Advanced Thru Hull Fixture We've Ever Built
- 3 days ago
- 3 min read
Full-Spectrum RGBW illumination. Patented anti-biofouling. Zero condensation. A new benchmark in underwater marine lighting.
At Metro Marine, we don't release new products until they're better, measurably and provably better, than anything else on the water. The F-THR4-FS-120 Full-Spectrum Thru Hull Fixture clears that bar decisively.
Designed for recreational and commercial vessels ranging from 32 to 100 feet, the F-THR4-FS-120 combines Metro Marine's patented innovations with a new LED architecture that sets a new standard for underwater illumination. Here's what that means in practice.
Built Around Two Patented Technologies That Change Everything
Most underwater fixtures fail the same two ways: biofouling clouds the lens and condensation foggs it from inside. The F-THR4-FS-120 was engineered specifically to eliminate both, permanently.
Patented UVC Anti-Biofouling Technology integrates 6 UVC emitters directly into the LED array. These emitters continuously inhibit the biological growth that normally accumulates on submerged lenses over time, keeping the optic clean and output consistent without any manual intervention. No scrubbing. No degraded light output. No service calls.
Patented Anti-Condensation Dry Gas Assembly Method seals the fixture using a proprietary process that prevents moisture from ever forming inside the housing. Where conventional fixtures fog up and deteriorate from within, Metro Marine's assembly method ensures the lens stays crystal clear, season after season, year after year.
These aren't marketing claims. They're patented, verified, and backed by field performance.
80 H.O. LEDs. 15,500 White Lumens. Zero Color Separation.
The F-THR4-FS-120 introduces a new LED array to the market: 80 High-Output LEDs per fixture (74 RGBW and 6 UVC), packed into a configuration specifically designed to allow close adjacent fixture placement while maintaining fully mixed, uniform light.
With a 120° beam angle and full-spectrum RGBW color blending, the fixture delivers vibrant, seamlessly mixed color at depth. White output reaches 15,500 lumens, with total fixture lumens exceeding 54,000. Efficiency comes in at 103 lm/W, impressive for a 150W fixture operating at 24VDC.
The result: uniform, brilliant light from vessels as small as 32 feet to superyachts reaching 100 feet.
Engineered for the Harshest Marine Environments
This fixture doesn't just meet marine-grade standards; it exceeds them.
The IP9K and IP68 dual rating means the F-THR4-FS-120 withstands high-pressure water jets and is fully submersible to 4.6 meters (15 feet). The housing is die-cast marine aluminum bronze with a polished finish, paired with a clear quartz lens that resists the optical degradation plastic alternatives suffer underwater. Hardware is silicon bronze throughout.
Salt spray resistance is certified to ASTM B117 for over 1,500 hours. Operating temperature range spans -40°C to +50°C. Calculated L50 lumen maintenance life exceeds 100,000 hours. Lloyd's Register and ABS approvals are currently pending.
The F-THR4-FS-120 is ABYC compliant and compatible with Metro Marine's MM-CC-V1 MFD Interface and iOS App, giving vessel operators full color and dimming control at their fingertips.
The Metro Marine Difference
Metro Marine has spent decades pushing what's possible in underwater marine lighting, specifically in optics design, LED control technology, and engineering integrity. The F-THR4-FS-120 represents the culmination of that work: a fixture with two patented core technologies, a purpose-built LED array, and materials selected specifically for long-term subsurface performance.
It's not the cheapest fixture on the market. It's the one that still looks and performs the same five years from installation.
Ready to learn more?
Explore the full specification sheet, accessories, and ordering information for the F-THR4-FS-120 at the link below. For custom installation calculations or distributor inquiries, our support team is standing by.
Patented technology. Exceptional performance. Built to last.
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