Aqua Signals LED lights are designed and tested for extreme environments above or below the waterline. Theyre excellent as both underwater lights or as deck/accent lights. Theyre surface-mounted, 4" diameter, low profile (5/8" tall) with a 35 beam angle. Easy to install, with a 60" watertight cable. The housings are made from seawater-resistant hard anodized aluminum. Multi-voltage (10-30V DC) with low amperage draw (less than 550mA). Rated IP68 waterproof.