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  2. List of automotive light bulb types - Wikipedia

    en.wikipedia.org/wiki/List_of_automotive_light...

    UN Regulation 37 covers motor vehicle filament lamps. These are categorized in three groups: those without general restriction that can be used in any application, those acceptable only for signalling lights (not for road illumination lamps), and those no longer allowable as light sources for new type approvals but still permitted for production as replacement parts.

  3. Headlamp - Wikipedia

    en.wikipedia.org/wiki/Headlamp

    The French yellow-light mandate was based on observations by the French Academy of Sciences in 1934, when the academy recorded that the selective yellow light was less dazzling than white light and that the light diffused less in fog than green or blue lights. [citation needed] Yellow light was obtained by dint of yellow glass for the headlight ...

  4. High-intensity discharge lamp - Wikipedia

    en.wikipedia.org/wiki/High-intensity_discharge_lamp

    Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan.

  5. Hot-bulb engine - Wikipedia

    en.wikipedia.org/wiki/Hot-bulb_engine

    Hot-bulb engine (two-stroke). 1. Hot bulb. 2. Cylinder. 3. Piston. 4. Crankcase Old Swedish hot-bulb engine in action. The hot-bulb engine, also known as a semi-diesel [1] or Akroyd engine, is a type of internal combustion engine in which fuel ignites by coming in contact with a red-hot metal surface inside a bulb, followed by the introduction of air (oxygen) compressed into the hot-bulb ...

  6. Tarantul-class corvette - Wikipedia

    en.wikipedia.org/wiki/Tarantul-class_corvette

    In the late 1970s, the Soviets realised the need for a larger, more seaworthy craft with better gun armament and higher positioned air search radars.In the Tarantul class, both the single 76 mm (3.0 in) main gun and the two 30 mm (1.2 in) Gatling-type guns are used for air defence, together with a comprehensive electronic warfare suite.

  7. 1140s BC - Wikipedia

    en.wikipedia.org/wiki/1140s_BC

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