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  2. Mercury-vapor lamp - Wikipedia

    en.wikipedia.org/wiki/Mercury-vapor_lamp

    The small diagonal cylinder at the bottom of the arc tube is a resistor which supplies current to the starter electrode. A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce light. [ 1] The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger soda ...

  3. Arc lamp - Wikipedia

    en.wikipedia.org/wiki/Arc_lamp

    An arc lamp or arc light is a lamp that produces light by an electric arc (also called a voltaic arc). The carbon arc light, which consists of an arc between carbon electrodes in air, invented by Humphry Davy in the first decade of the 1800s, was the first practical electric light. [ 1][ 2] It was widely used starting in the 1870s for street ...

  4. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Additionally, blue is the color used by law enforcement agencies. In California, all emergency vehicles just use red warning lights, with 1 steady red warning light facing forward. Blue lights may only be used on vehicles operated by Peace Officers, as defined under California Penal Code 830.1 to 830.38.

  5. The myth and science behind your gauge cluster illumination color

    www.autoblog.com/2017/02/28/bmw-x4-toyota-tacoma...

    Basically, at a given amount of light, humans perceive green to be the brightest and easiest to see, the explanation goes. But just like BMW, Toyota has moved to white gauge illumination. In the ...

  6. High-intensity discharge lamp - Wikipedia

    en.wikipedia.org/wiki/High-intensity_discharge_lamp

    The Kelvin color temperature scale ranges from 1000K (amber) to 3000K (yellow) to 5500K (white) to 8000K (blue) to 12000K (purple). HID Lamp Color Temperature Range. HID lamps produce different colors of light primarily through the use of various metal additives in the lamp's arc tube and the physics of the gas discharge process. [10]

  7. Xenon arc lamp - Wikipedia

    en.wikipedia.org/wiki/Xenon_arc_lamp

    A xenon arc lamp is a highly specialized type of gas discharge lamp, an electric light that produces light by passing electricity through ionized xenon gas at high pressure. It produces a bright white light to simulate sunlight, with applications in movie projectors in theaters, in searchlights, and for specialized uses in industry and research ...

  8. Arc flash - Wikipedia

    en.wikipedia.org/wiki/Arc_flash

    One of the most common examples of an arc flash occurs when an incandescent light bulb burns out. When the filament breaks, an arc is sustained across the filament, enveloping it in plasma with a bright, blue flash. Most household lightbulbs have a built-in fuse, to prevent a sustained arc-flash from forming and blowing fuses in the circuit panel.

  9. Sanctuary lamp - Wikipedia

    en.wikipedia.org/wiki/Sanctuary_lamp

    A ner tamid hanging over the ark in a synagogue. In Judaism, the sanctuary lamp is known as a Ner Tamid (Hebrew, “eternal flame” or “eternal light”), Hanging or standing in front of the ark in every Jewish synagogue, it is meant to represent the menorah of the Temple in Jerusalem, as well as the perpetual fire kept on the altar of burnt offerings before the Temple. [2]