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  2. Germicidal lamp - Wikipedia

    en.wikipedia.org/wiki/Germicidal_lamp

    A 9W germicidal lamp in a modern compact fluorescent lamp form factor Glow of a germicidal lamp excited by a high voltage probe. Close-up of the electrodes and the safety warning. A germicidal lamp (also known as disinfection lamp or sterilizer lamp) is an electric light that produces ultraviolet C (UVC) light.

  3. Ultraviolet germicidal irradiation - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet_germicidal...

    The UV lamps for water treatment consist of specialized low-pressure mercury-vapor lamps that produce ultraviolet radiation at 254 nm, or medium-pressure UV lamps that produce a polychromatic output from 200 nm to visible and infrared energy. The UV lamp never contacts the water; it is either housed in a quartz glass sleeve inside the water ...

  4. 40 of Walmart's best after Christmas sales: Planners, TVs ...

    www.aol.com/lifestyle/walmart-after-christmas...

    Get deals on holiday storage, 2024 planners, space heaters and more during Walmart's after-Christmas sales. 40 of Walmart's best after Christmas sales: Planners, TVs, space heaters and more Skip ...

  5. Tanning lamp - Wikipedia

    en.wikipedia.org/wiki/Tanning_lamp

    Typical lifespans for low-pressure lamps are from 300 to 1,600 hours of actual use although they may light and produce very little UV for as much as 5000 hours. High-pressure lamps range from 300 to 1,000 hours, and should be replaced when they have reached their maximum life to prevent any possible damage to the ballast, [ 4 ] although this is ...

  6. Ultraviolet - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet

    Halogen lamps with fused quartz envelopes are used as inexpensive UV light sources in the near UV range, from 400 to 300 nm, in some scientific instruments. Due to its black-body spectrum a filament light bulb is a very inefficient ultraviolet source, emitting only a fraction of a percent of its energy as UV, as explained by the black body ...

  7. Excimer lamp - Wikipedia

    en.wikipedia.org/wiki/Excimer_lamp

    Excimer lamps are quasimonochromatic light sources operating over a wide range of wavelengths in the ultraviolet (UV) and vacuum ultraviolet (VUV) spectral regions. Operation of an excimer lamp is based on the formation of excited dimers (), which spontaneously transiting from the excited state to the ground state result in the emission of UV photons.

  8. History of street lighting in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_street_lighting...

    In 1980, the annual operating cost for the average incandescent lamp was $280; for mercury vapor lamps, it was $128; and for low-pressure sodium vapor lamps, it was $60 a year. [1] Meanwhile, high-pressure sodium vapor lamps cost only $44 a year to operate, with a standard life expectancy of 15,000 hours, which also helped to lower labor and ...

  9. Mercury-vapor lamp - Wikipedia

    en.wikipedia.org/wiki/Mercury-vapor_lamp

    A closeup of a 175-W 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]

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