What is the use of the searchlight?
World War II searchlights have been used in large numbers against the enemy's night air raids.
The searchlight is a device that has a strong light source and a concave mirror that can concentrate light on a particular direction, with a mirror or lens that concentrates the emitted beam in a small solid angle (typically less than 2 degrees)
Today, most of the advertising, such as car dealers promotional activities, film premiere and so on.
Due to the development of electronic surveillance equipment technology, the military use of searchlight is declining.
Searchlight for long distance lighting and search.
