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  2. Sodium-vapor lamp - Wikipedia

    en.wikipedia.org/wiki/Sodium-vapor_lamp

    Sodium vapor street light Closeup after dark At end of life, high-pressure sodium (HPS) lamps exhibit a phenomenon known as cycling , caused by a loss of sodium in the arc. Sodium is a highly reactive element and is lost in a reaction with the aluminum oxide of the arc tube.

  3. Street light - Wikipedia

    en.wikipedia.org/wiki/Street_light

    A street light, light pole, lamp pole, lamppost, streetlamp, light standard, or lamp standard is a raised source of light on the edge of a road or path. Similar lights may be found on a railway platform .

  4. LED street light - Wikipedia

    en.wikipedia.org/wiki/LED_street_light

    The shape of the LED street light depends on several factors, including LED configuration, the heat sink used with the LEDs and aesthetic design preference. Heat sinks for LED street lights are similar in design to heat sinks used to cool other electronics such as computers and smart street light energy saving systems. Heat sinks tend to have ...

  5. Solar street light - Wikipedia

    en.wikipedia.org/wiki/Solar_street_light

    A solar street light in British Columbia, Canada. The solar panel is one of the most important parts of a solar street light, as the solar panel can convert solar energy into electricity that the lamps can use. There are two types of solar panels commonly used in solar street lights: monocrystalline and polycrystalline. The conversion rate of ...

  6. Light tube - Wikipedia

    en.wikipedia.org/wiki/Light_tube

    This system, which collects light without requiring mobile parts such as a heliostat or a parabolic collector, is intended to transfer light to any place within a building. [ 41 ] [ 42 ] [ 43 ] By capturing ultraviolet, the system can be especially effective on bright but overcast days; this is since ultraviolet is diminished less by cloud ...

  7. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    The spectrum of light emitted from a fluorescent lamp is the combination of light directly emitted by the mercury vapor, and light emitted by the phosphorescent coating. The spectral lines from the mercury emission and the phosphorescence effect give a combined spectral distribution of light that is different from those produced by incandescent ...

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