Osculati Sphera 112.5° Green Side Light (Starboard) – Reliable Right Side Visibility

The green Osculati Sphera side light (code 11.408.12) is a crucial component for proper visual signaling of your vessel’s starboard side during night operations. According to international regulations, the starboard side of a boat must be marked with a green light covering a 112.5° horizontal arc – from dead ahead to about 22.5° abaft the beam on the starboard side. This Sphera light provides exactly that coverage, ensuring that when another vessel approaches you from the right, they will see a green light and understand they are on your starboard side (and in a crossing situation, they would know they have the right of way). Thus, it greatly improves inter-vessel communication and reduces the chance of confusion or collisions at night.

The Osculati Sphera green light is designed for boats up to 12 m in length, aligning with the slightly reduced range requirements (1 NM) for side lights on vessels of this size. The light has been rigorously tested and carries a RINA certificate confirming that it meets COLREG72 standards – meaning it has the correct color, intensity, and arc for a starboard-side light on small craft. The fixture’s housing is white and made of high-strength plastic (polycarbonate) – a material chosen for its resistance to corrosion, UV damage, and impact. The lens is green, molded from a durable polymer that won’t fade and ensures a true green output. The lamp’s construction is completely waterproof, with built-in seals to keep the bulb and electrical contacts dry. This means that even in heavy rain or when waves crash over the gunnel, you can rely on the light to stay lit and effective.

Internally, the Osculati Sphera is equipped with a 12 V, 10 W halogen festoon bulb that produces a bright and vivid green light. It’s optimized to meet the 1 NM visibility requirement for side lights on sub-12 m boats. If you’re looking to minimize power draw or extend service intervals, you have the option to swap out the halogen for a compatible LED bulb – the changeover is simple and requires no modification to the housing. Installing this side light is straightforward. Typically, it’s mounted on the starboard side of the boat – for example, on the cabin side or wheelhouse frame for enclosed boats, or on the exterior hull/deck coaming near the bow for open boats. You’ll need to drill two holes for the mounting screws and a small hole for the wiring. After that, secure the fixture firmly with appropriate screws (either use the ones provided or stainless steel screws to avoid rust). It’s advisable to apply a marine sealant around the base before tightening it down to ensure a watertight seal. The final step is the electrical hookup – connect the two wires to your boat’s navigation light circuit (there’s usually a separate feed for the port and starboard lamps, protected by a fuse). Once installed, test the light from a distance in darkness: it should be clearly visible in the designated sector and not visible from the port side of your vessel. With the Osculati Sphera green light properly in place, your craft is correctly equipped to signal its starboard side – helping everyone around you to navigate safely and avoid incidents at night.

• Typical Use Cases: This green starboard light is a mandatory part of the navigation light setup for all powerboats and sailboats up to 12 m, used to mark the boat’s right-hand side. It’s applicable in a wide range of situations – from night fishing trips and evening leisure cruises to lengthy offshore passages or participation in overnight sailing races. It’s particularly valuable when maneuvering in crowded marinas or channels after dark, where clearly indicating your starboard side helps other skippers anticipate your movements. Essentially, any time you take your vessel out in the dark, having this light functioning is critical for safety.
• Recommended Vessel Size: Intended for vessels under 12 meters in length. In this class, side lights must have a minimum visibility of 1 NM, and the Osculati Sphera green light meets that requirement. It’s suitable for boats at the smaller end (5-6 m runabouts) right up to larger 10-12 m yachts that need a reliable starboard nav light. If your boat is in this size range, this product ensures you meet the necessary visibility and identification standards for your starboard side.
• Installation Tips: Mount the green light on the starboard side in a position where it shines freely forward and to the side without obstruction. Typically, the mounting height should be level with that of the red light on the port side for symmetry and compliance. If mounting on a cabin or superstructure, ensure that no parts of the boat (window frames, railings, etc.) intrude into the 112.5° light arc. Use the supplied gasket or apply sealant under the fixture’s base to make the installation watertight. Also, shield any exposed wiring connections with heat-shrink tubing or marine-grade electrical tape, since side lights sit low and are more exposed to splashing. Finally, keep a spare bulb on board – while halogens are long-lasting, having a backup means you can quickly restore your navigation lights in case one burns out, thereby maintaining continuous safety.