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2. Sankaty Head Light - Wikipedia

   en.wikipedia.org/wiki/Sankaty_Head_Light

   Added to NRHP. October 15, 1987. The Sankaty Head Light is a lighthouse located on Nantucket island. It was built in 1850, was automated in 1965, and is still in operation. It is located at the easternmost point of the island, in the village of Siasconset. It was one of the first lighthouses in the United States to receive a Fresnel lens .

3. 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.

4. 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.

5. QED: The Strange Theory of Light and Matter - Wikipedia

   en.wikipedia.org/wiki/QED:_The_Strange_Theory_of...

   9780691083889. QED: The Strange Theory of Light and Matter is an adaptation for the general reader of four lectures on quantum electrodynamics (QED) published in 1985 by American physicist and Nobel laureate Richard Feynman . QED was designed to be a popular science book, written in a witty style, and containing just enough quantum-mechanical ...

6. Plasma lamp - Wikipedia

   en.wikipedia.org/wiki/Plasma_lamp

   A plasma lamp. Plasma lamps are a type of electrodeless gas-discharge lamp energized by radio frequency (RF) power. They are distinct from the novelty plasma lamps that were popular in the 1980s. The internal-electrodeless lamp was invented by Nikola Tesla after his experimentation with high-frequency currents in evacuated glass tubes for the ...

7. Gas-discharge lamp - Wikipedia

   en.wikipedia.org/wiki/Gas-discharge_lamp

   Gas-discharge lamps are a family of artificial light sources that generate light by sending an electric discharge through an ionized gas, a plasma . Typically, such lamps use a noble gas ( argon, neon, krypton, and xenon) or a mixture of these gases. Some include additional substances, such as mercury, sodium, and metal halides, which are ...