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  2. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    An LED 50-watt traffic light in Portsmouth, United KingdomTraffic lights, traffic signals, or stoplights – also known as robots in South Africa, [1] [2] Zambia, and Namibia – are signaling devices positioned at road intersections, pedestrian crossings, and other locations in order to control the flow of traffic.

  3. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.

  4. Bardic lamp - Wikipedia

    en.wikipedia.org/wiki/Bardic_lamp

    The Bardic Rail Signalling Lamp was the original name of a particular type of battery powered railway signalling handlamp made from 1962 by Bardic, Ltd. [1] for use by rail and trackside workers. It became the standard battery operated handlamp in use on British Rail , replacing oil-lit lamps.

  5. LED lamp - Wikipedia

    en.wikipedia.org/wiki/LED_lamp

    A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

  6. Railway signal - Wikipedia

    en.wikipedia.org/wiki/Railway_signal

    The signal head is the portion of a colour light signal which displays the aspects. To display a larger number of indications, a single signal might have multiple signal heads. Some systems used a single head coupled with auxiliary lights to modify the basic aspect. Colour light signals come in two forms.

  7. Signal lamp - Wikipedia

    en.wikipedia.org/wiki/Signal_lamp

    Signal lamp training during World War II. A signal lamp (sometimes called an Aldis lamp or a Morse lamp [1]) is a visual signaling device for optical communication by flashes of a lamp, typically using Morse code. The idea of flashing dots and dashes from a lantern was first put into practice by Captain Philip Howard Colomb, of the Royal Navy ...

  8. Traffic signal preemption - Wikipedia

    en.wikipedia.org/wiki/Traffic_signal_preemption

    Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights.The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.

  9. Signal lights - Wikipedia

    en.wikipedia.org/wiki/Signal_lights

    Signal lights may refer to: Traffic light, signal lights controlling automotive & pedestrian traffic flow; Turn signals, signal lights indicating automotive change of direction; Railway signalling, use of signal lights to control train traffic flow; Signal lamp, a device for communicating between ships with flashing lights.