Lopolight Series 300-039 - Double Stacked Masthead Light - 5NM - Vertical Mount - White - Silver Housing

The Lopolight Series 300-039 Double Stacked Masthead Light is purpose-built for serious boaters and commercial mariners who demand reliable navigation lighting in demanding conditions. After years on the water, any experienced captain knows that visibility at night isn't optional—it's a safety foundation. This vertical-mount masthead light delivers a 5-nautical-mile visibility range, meeting federal requirements for vessels operating in open water and coastal zones. The double-stacked configuration maximizes light output while maintaining a compact footprint ideal for sailboats, fishing vessels, and trawlers where mast real estate is at a premium.

Built with a silver anodized housing, the Lopolight 300-039 resists corrosion from saltwater exposure and UV degradation—critical durability factors for marine environments. The white light output serves as an all-around masthead light, signaling your vessel's position and heading to other traffic during twilight, night, and low-visibility operations. LED technology ensures efficient power draw, reducing strain on battery systems during extended offshore passages. The vertical mount design simplifies installation on standard mast extrusions and allows proper light dispersion across the full 360-degree horizon required by maritime law. At just 3 pounds, it imposes minimal top-weight penalty that could otherwise affect vessel stability or mast bend characteristics.

This masthead light is ideal for mariners operating under USCG or international maritime regulations where certified navigation lighting is non-negotiable. Whether you're running night passages, anchored in crowded harbors, or fishing under artificial light, the Lopolight Series 300-039 keeps your vessel compliant and visible. Installation works best on vessels with mast heights that support the 5NM range requirement; smaller open boats or bay-only vessels may benefit from lower-profile steaming lights. The compact 6 x 4 x 8-inch profile fits tight mast-crown configurations without requiring extensive rewiring or structural modifications. For any boater serious about night operations, this double-stacked configuration delivers the output and reliability offshore work demands.