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Emergency vehicle lighting. Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized ...
Blue Strobe light. A strobe light or stroboscopic lamp, commonly called a strobe, is a device used to produce regular flashes of light. It is one of a number of devices that can be used as a stroboscope. The word originated from the Ancient Greek στρόβος ( stróbos ), meaning "act of whirling". A typical commercial strobe light has a ...
Approach lights at Jyväskylä Airport, Finland The approach lighting system of Bremen Airport Approach lighting at Love Field, Dallas. An approach lighting system (ALS) is a lighting system installed on the approach end of an airport runway and consisting of a series of lightbars, strobe lights, or a combination of the two that extends outward from the runway end.
A flash is a device used in photography that produces a brief burst of light (typically lasting 1⁄1000 to 1⁄200 of a second) at a color temperature of about 5,500 K (5,230 °C; 9,440 °F) [1] [citation needed] to help illuminate a scene. A major purpose of a flash is to illuminate a dark scene.
Variations in traffic light operation. Swedish traffic light (left) for use by public transport vehicles only. All signals use white lighting and special symbols ("S", "–" and an arrow) to distinguish them from regular signals. The small light at the top tells the driver when the vehicle's transponder signal is received by the traffic light.
Gas lamps gradually started replacing oil street lamps in the United States, beginning in the first quarter of the 19th century. [ 3] The first street in the world to be illuminated by gaslight was Pall Mall in London, starting in 1807. [ 1][ 5] The first US city to use gas street lights was Baltimore, starting in 1817. [ 4]
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