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  2. Color temperature - Wikipedia

    en.wikipedia.org/wiki/Color_temperature

    Color temperature is a parameter describing the color of a visible light source by comparing it to the color of light emitted by an idealized opaque, non-reflective body. The temperature of the ideal emitter that matches the color most closely is defined as the color temperature of the original visible light source.

  3. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.

  4. Sodium-vapor lamp - Wikipedia

    en.wikipedia.org/wiki/Sodium-vapor_lamp

    A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm . Two varieties of such lamps exist: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor ...

  5. Shades of pink - Wikipedia

    en.wikipedia.org/wiki/Shades_of_pink

    Shades of pink. Pink colors are usually light or desaturated shades of reds, roses, and magentas which are created on computer and television screens using the RGB color model and in printing with the CMYK color model. As such, it is an arbitrary classification of color. Below is a list of some of the common pink colors.

  6. Blacklight - Wikipedia

    en.wikipedia.org/wiki/Blacklight

    A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave ( UV-A) ultraviolet light and very little visible light. [ 1][ 2][ 3] One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV ...

  7. Amaryllis - Wikipedia

    en.wikipedia.org/wiki/Amaryllis

    Amaryllis belladonna flowers. Amaryllis is a bulbous plant, with each bulb being 5–10 cm (2.0–3.9 in) in diameter. It has several strap-shaped, hysteranthous, green leaves with midrib, 30–50 cm (12–20 in) long and 2–3 cm (0.79–1.18 in) broad, arranged in two rows. Each bulb produces one or two leafless, stout, persistent and erect ...

  8. Centennial Light - Wikipedia

    en.wikipedia.org/wiki/Centennial_Light

    The Centennial Light is an incandescent light bulb, recognized as the oldest known continuously operating light bulb. It was first illuminated in 1901, and has only been turned off a few brief times since. It is located at 4550 East Avenue, Livermore, California, and is open to public viewing. [ 1] Due to its longevity, the bulb has been noted ...

  9. Mystery solved of eerie pink light that appeared over Kent town

    www.aol.com/news/mystery-solved-eerie-pink-light...

    The reality of the light, however, has a much more reasonable explanation. Thanet Earth, a large industrial factory located in Birchington, Thanet is responsible for the artificial pink light ...

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