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2. Leading lights - Wikipedia

   en.wikipedia.org/wiki/Leading_lights

   Leading lights, also known as range lights in the United States, are a pair of light beacons used in navigation [2] to indicate a safe passage for vessels entering a shallow or dangerous channel; they may also be used for position fixing. At night, the lights are a form of leading line that can be used for safe navigation.

3. Sodium-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Sodium-vapor_lamp

   A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor ...

4. Light fixture - Wikipedia

   en.wikipedia.org/wiki/Light_fixture

   A wide variety of special light fixtures are created for use in the automotive lighting industry, aerospace, marine and medicine sectors. [2] [3] Portable light fixtures are often called lamps, as in table lamp or desk lamp. In technical terminology, the lamp is the light source, which, in casual terminology, is called the light bulb.

5. Den Haan Rotterdam B.V. - Wikipedia

   en.wikipedia.org/wiki/Den_Haan_Rotterdam_B.V.

   The factory in Capelle aan den IJssel. Den Haan Rotterdam B.V. is a metalwork manufacturing company specialising in navigation lights, searchlights, floodlights and ship's horns for the shipping industry. The company, originally established as a tinsmith workshop by Marinus den Haan on August 7, 1922, [1] is located in Rotterdam, the Netherlands.

6. Light characteristic - Wikipedia

   en.wikipedia.org/wiki/Light_characteristic

   The range in which the light is visible, e.g. "10M" for 10 nautical miles. An example of a complete light characteristic is "Gp Oc(3) W 10s 15m 10M". This indicates that the light is a group occulting light in which a group of three eclipses repeat every 10 seconds; the light is white; the light is 15 metres above the chart datum and the ...

7. Navigation light - Wikipedia

   en.wikipedia.org/wiki/Navigation_light

   Navigation light. A navigation light, also known as a running or position light, is a source of illumination on a watercraft, aircraft or spacecraft, meant to give information on the craft's position, heading, or status. [1] Some navigation lights are colour-coded red and green to aid traffic control by identifying the craft's orientation.