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  2. Lightbulb joke - Wikipedia

    en.wikipedia.org/wiki/Lightbulb_joke

    Lightbulb jokes are often responses to contemporary events. [14] For example, the lightbulb may not need to be changed at all due to ongoing power outages. [15]The Village Voice held a $200 lightbulb joke contest around the time of the Iran hostage crisis, with the winning joke being: [16]

  3. Glow stick - Wikipedia

    en.wikipedia.org/wiki/Glow_stick

    A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once.

  4. Wikipedia : How many Wikipedians does it take to change a ...

    en.wikipedia.org/wiki/Wikipedia:How_many...

    One from the previous RM to replace the former lightbulb with an LED light bulb, despite rejection from 107 users. One uninvolved editor to open a dispute resolution case over the switch to an LED bulb. Two to mediate the dispute. One to close the thread due to excessive personal attacks. One to open an articles for deletion discussion about ...

  5. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    All miniature bulbs, including some LED sets, have a wedge base, though their designs are inconsistent with one another, making it somewhat difficult for the average consumer to change bulbs. To replace a bulb, the plastic base of the bulb must usually be changed by straightening the two wires and pulling the glass part out. Most replacement ...

  6. Incandescent light bulb - Wikipedia

    en.wikipedia.org/wiki/Incandescent_light_bulb

    An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a filament that is heated until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation .

  7. Tears - Wikipedia

    en.wikipedia.org/wiki/Tears

    The functions of tears include lubricating the eyes (basal tears), removing irritants (reflex tears), and also aiding the immune system. [3] Tears also occur as a part of the body's natural pain response. [4] Emotional secretion of tears may serve a biological function by excreting stress-inducing hormones built up through times of emotional ...

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  9. Gas-discharge lamp - Wikipedia

    en.wikipedia.org/wiki/Gas-discharge_lamp

    A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...