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2. Emergency vehicle lighting - Wikipedia

   en.wikipedia.org/wiki/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 vehicles in a variety of ...

3. Mobile infrared transmitter - Wikipedia

   en.wikipedia.org/wiki/Mobile_Infrared_Transmitter

   The timer causes the infrared LEDs to strobe at specific frequencies, such as 10Hz for low priority (buses) or 14 Hz for high priority (emergency vehicles). [citation needed] Low priority transmitters will control the intersection to perform a normal light change, while high priority transmitters will change an entire intersection immediately.

4. Emergency light - Wikipedia

   en.wikipedia.org/wiki/Emergency_light

   An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage. In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories, apartments, and hotels.

5. Emergency vehicle equipment - Wikipedia

   en.wikipedia.org/wiki/Emergency_vehicle_equipment

   The lights can be made to flash via a range of techniques, dependent on the technology used, and the desired end effect. Types of beacon include: Light bars - A long but narrow 'strip' of lights on top of an emergency vehicle, which can be configured with almost infinite combinations of different lighting technologies from the list below. These ...

6. HAWK beacon - Wikipedia

   en.wikipedia.org/wiki/HAWK_beacon

   Emergency-vehicle hybrid beacons, for emergency vehicle facilities (i.e. fire stations), use the same signal head design, and uses an alternating flashing red aspect to protect departing emergency vehicles. The only distinguishing part of the design is a different sign, R10-14, which is used with the signal. Unlike at a HAWK beacon, drivers are ...

7. How to Watch the Last-Minute Northern Lights Display Tonight

   www.aol.com/watch-last-minute-northern-lights...

   The northern lights are expected to be strongest between Friday, Jan. 31, and Saturday, Feb. 1. The best time to view them is from 10:00 p.m. and 2 a.m. local time.