ULITECO RGBW LED Boat Courtesy Light 3.9" — IP67 Waterproof, Marine-Grade Polycarbonate, Two-Wire Install

ULITECO 3.9-inch RGBW LED Boat Courtesy Light is a waterproof, surface-mount marine cabin and deck lamp that cycles white, blue, red, and green with a simple two-wire install and a hidden bezel for a clean finish.

Designed for marine environments, this ULITECO courtesy light delivers multi-color interior and deck illumination in a compact, rugged package. Built from 2mm marine-grade polycarbonate and sealed with waterproof glue to an IP67 rating, it resists salt, splashes, and short submersions. The larger 3.9" diameter covers older mounting holes, and the snap-on bezel conceals screws for a tidy, finished look on pontoons, bass boats, sailboats, and yachts.

How does the ULITECO light perform in wet or salty marine conditions?

The light is fully glue-sealed and rated IP67, protecting LEDs, lenses, and electronics from moisture and brief immersion. Its marine-grade PC housing resists corrosion and impact so it holds up in spray, rain, and humid cabins.

• IP67-rated full glue seal for short underwater exposure
• Saltwater-resistant 2mm marine-grade polycarbonate body
• Protected LED chips and recessed lens design to reduce damage

What makes installation quick and neat on an existing boat?

This courtesy light uses a simple two-wire hookup—positive and negative—so you can replace older single-color lights without rewiring complex controls. It includes three stainless-steel M3×20mm screws for surface mounting, and the white bezel snaps over the screws to hide them for a seamless finish.

• Two-wire connection for fast replacement of standard lighting
• 3.9" diameter covers many old mounting holes and marks
• Snap-on bezel hides screws for a flush, clean appearance

How do the RGBW colors and controls work in everyday use?

Colored lighting cycles through white, blue, red, and green with each power-on sequence; a mechanical switch changes modes by toggling power. If left off for 10 seconds, the light resets to white and will begin the color sequence again when re-powered.

• Sequential color cycle: white → blue → red → green
• Simple on/off switch control—no separate controller required
• Automatic reset to white after 10 seconds power-off for predictable behavior

How durable is the fixture for real-world boating use?

Constructed from impact-resistant 2mm PC, the fixture tolerates knocks and vibrations while resisting deformation and UV exposure. Stainless-steel fasteners and full potting of internal components protect against corrosion, making it suitable for deck, cabin, and transom applications.

• 2mm thick marine-grade PC housing for impact and UV resistance
• Stainless-steel mounting hardware included for corrosion protection
• Potted electronics reduce failure risk in humid environments

Who this is for: The ULITECO 3.9" RGBW LED courtesy light suits boat owners who want a durable, multicolor replacement lamp that covers old mounting imperfections and installs quickly with minimal wiring. It’s aimed at pontoon, bass, and recreational boat owners who need reliable, waterproof interior and deck lighting without complex controllers—ideal for DIY installers, boatyards doing mid-life upgrades, and anyone replacing worn courtesy or transom lights.