Shadow-Caster SC2 Full-Color Surface Mount Underwater Boat Light – Composite Housing, 3000 Lumens

Most underwater lights bright enough to matter are bronze, and bronze is the last thing you want bolted to an aluminum pontoon tube sitting in water. The SC2 solves it with a polymer composite housing — no dissimilar metal at the mounting face, nothing to set up a galvanic cell, and no corrosion path back into your tubes.

What you get for that is a lot of light. Up to 3,000 lumens across a 120° beam, from a fixture 3" across and just over half an inch deep. It surface mounts below the waterline with three screws — this is a bolt-on, not a haul-out.

Color is built in and does not require buying a controller first. Power Toggle Control steps through twelve colors and brightness levels using nothing but the switch at your helm: flick it off and on to advance. If you decide later that you want fading, strobe rates, music sync or control from a chartplotter, the Shadow-NET module adds all of it without replacing the lights.

Gel-filled internally with a tempered, scratch-resistant glass lens, IP68, and a 3-foot submersible-grade lead. Backed by Shadow-Caster's 3-year warranty.

Install note: mounts below the waterline, three screws, with a small pass-through for the cable. Most pontoons run a pair either side of the motor. Wire to a switched, fused circuit — and if you want the toggle color control to work properly, put it on its own switch rather than sharing one.