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  • Plasma lamp

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    Plasma lamps are a type of 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 Tesla after his experimentation with high-frequency currents in evacuated glass tubes for the purposes of lighting and the study of high voltage phenomena. The first practical plasma lamps were the sulfur lamps manufactured by Fusion Lighting. This lamp suffered a number of practical problems and did not prosper commercially. Plasma lamps with an internal phosphor coating are called external electrode fluorescent lamps (EEFL); these external electrodes or terminal conductors provide the radio frequency electric field.

  • Hot box (appliance)

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    Door Open. Door Closed. A hot box is an improvised appliance to heat up food, usually with at least two normal incandescent light bulbs as the heat source, that is frequently found in break rooms on construction sites. The enclosure can be made of wood, metal, or any available material that can enclose the heat. It's especially useful for heating up food that could not otherwise be heated in a microwave oven without decanting the contents. Its presence also means that a large rush of people to use any available microwave ovens is tempered by those who are able to have had their meals heated up via this different method.

  • Sulfur lamp

    serch.it?q=Sulfur-lamp

    The sulfur lamp (also sulphur lamp) is a highly efficient full-spectrum electrodeless lighting system whose light is generated by sulfur plasma that has been excited by microwave radiation. They are a particular type of plasma lamp, and one of the most modern. The technology was developed in the early 1990s, but, although it appeared initially to be very promising, sulfur lighting was a commercial failure by the late 1990s. Since 2005, lamps are again being manufactured for commercial use.Sulfur lamp

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