Lumishore ORA THX204 Thru-Hull Underwater LED Light, Blue

The Lumishore ORA THX204 is built for boaters who want a clean, bright underwater glow without wrestling with a complicated install. This is a thru-hull light, which means it mounts through the bottom or side of the hull and sits flush against the fiberglass, throwing light directly into the water column. The result is that signature blue halo around the transom that turns a quiet night at anchor into something worth staying up for.

Output is where the THX204 earns its keep. It produces 6,100 verified white fixture lumens and drives an ultra-wide 110-degree beam angle, so the light saturates deep and spreads far instead of punching a narrow spotlight straight down. That wide throw is what fills the water with color and draws baitfish, and the baitfish draw everything else. The light runs 24 individual 3-watt high-power LEDs in Lumishore's HICOB array, tuned to a rich blue that reads beautifully in clear and stained water alike.

Installation is genuinely simple. The THX204 needs only a 5/8-inch (16.5mm) hull cutout, which is a small hole compared to many competing thru-hull fixtures, so you're removing less material and fairing a smaller area. Wiring is a straightforward 2-wire connection with no external driver box to find room for and no separate control module to mount. The driver is built right into the fixture, so you run positive and negative, connect a standard on/off switch, and you're done. That makes it a realistic weekend job for a capable owner, and an easy one for a yard.

Because it's a thru-hull design, the THX204 is suitable for transom, side-hull, or bottom installations, which gives you flexibility depending on your boat's layout and how you want the light to project. Center-console owners often run a pair on the transom, while larger hulls spread several along the sides for a continuous wash of color. However you place them, the multi-channel internal driver keeps the output steady across the 12 and 24-volt range.

Durability is handled by a housing made from marine-grade aluminum bronze. That matters because a thru-hull light lives its entire life submerged in saltwater, and bronze resists corrosion and galvanic attack far better than lesser materials. Paired with a rated LED life of over 50,000 hours, this is a fixture designed to stay put and stay bright for years rather than a season. Lumishore backs it with a 3-year warranty.

On the electrical side, the THX204 accepts 12 or 24-volt DC systems and draws a maximum of 4.9 amps at 12 volts or 2.4 amps at 24 volts. That's an easy load for most house banks, so you can leave the lights on through an evening without watching your battery monitor. Control couldn't be simpler either, since it's a single-color fixture operated by a standard on/off switch. There's no app, no controller, and nothing to fail. You flip the switch and the water lights up blue.

If you fish at night, dive off the swim platform, or just love the look of a lit-up waterline while friends are aboard, the THX204 delivers a lot of light for the effort. It's a smart pick for anglers chasing snapper and squid after dark, for sandbar regulars who want their boat to stand out, and for anyone who appreciates gear that installs cleanly and then quietly does its job. You get real brightness, a proven bronze housing, and an install that won't eat your whole weekend.

We'd recommend the blue THX204 for offshore and coastal boats where clear-water penetration and that classic underwater blue are the goal. It's a straightforward, well-built light that looks the part and holds up to the environment it's asked to live in.