The Stern Navigation Signal Light, with a 25W power rating and Type CXH4-3, is designed for maritime safety and communication. It operates on a DC 24V rated voltage and features an incandescent lamp as its illuminant, providing a clear, visible signal. The light can be seen over a distance of 2 nautical miles, ensuring visibility in various conditions. With a horizontal arc of 135 degrees and a vertical arc of +5 degrees, it covers a significant area behind the vessel. The lamp holder is a B15d type, and the light comes in white or yellow, with options for a transparent, red, green, or yellow lamp shade made of durable PC engineering plastic. The steel body and IP56 protection class indicate a robust design capable of withstanding harsh marine environments, from temperatures ranging between -30°C to +55°C. Weighing only 0.45 kg, it offers a lightweight yet sturdy solution for maritime navigation, with a seat-mounted installation method that accommodates a cable outside diameter of 10~12 mm. This combination of features ensures compliance with maritime regulations, providing a reliable source of illumination for vessels navigating after dark or in poor visibility conditions.