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2. Hydrargyrum quartz iodide - Wikipedia

   en.wikipedia.org/wiki/Hydrargyrum_quartz_iodide

   Hydrargyrum quartz iodide (HQI) is a trademark name of Osram's brand of metal halide lamps [1] made for general floodlighting, arena floodlighting, shop and commercial and industrial lighting. Hydrargyrum is the Latin name for the element mercury. When heated, mercury vapour is created inside the lamp, and deposited when it cools.

3. Luminous gemstones - Wikipedia

   en.wikipedia.org/wiki/Luminous_gemstones

   Scholars have proposed many identifications for myths about luminous gemstones described for over two thousand years. Most frequently rubies or carbuncles (often red garnets ), which classical and medieval mineralogists did not differentiate, and less commonly other gems, including diamonds, emeralds, jade, and pearls (Ball 1938: 497).

4. Halogen lamp - Wikipedia

   en.wikipedia.org/wiki/Halogen_lamp

   [Note 2] If a lamp has a "G" code, [Note 3] this will mean the lamp is a bipin shape and the number following the G will indicate the distance in millimeters between the pins, usually either 4, 6.35 or 10; if the G is followed by a letter "Y", then the lamp's pins are thicker than normal— thus, a G6.35 has pins that are 1 mm in diameter but a ...

5. Luminous efficacy - Wikipedia

   en.wikipedia.org/wiki/Luminous_efficacy

   Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.

6. Lampworking - Wikipedia

   en.wikipedia.org/wiki/Lampworking

   Lampworking is a type of glasswork in which a torch or lamp is used to melt the glass. Once in a molten state, the glass is formed by blowing and shaping with tools and hand movements. It is also known as flameworking or torchworking , as the modern practice no longer uses oil-fueled lamps .

7. FEL lamp - Wikipedia

   en.wikipedia.org/wiki/FEL_lamp

   The FEL lamp (less accurately called a light bulb) is an ANSI standard 1000 watt quartz halogen lamp with a G9.5 medium 2-pin base used in many stage and studio lights that costs around $12 and is available from a number of manufacturers including GE, Osram, Ushio, Eiko, and Philips. Note that the term FEL is an ANSI designation (not an acronym ...

8. Infrared heater - Wikipedia

   en.wikipedia.org/wiki/Infrared_heater

   In quartz halogen lamps, a small amount of halogen gas is added to prolong the heater's operational life. The majority of the radiant energy released at operational temperatures is transmitted through the thin quartz tube but some of that energy is absorbed by the silica quartz glass tube causing the temperature of the tube wall to increase ...

9. Pegmatite - Wikipedia

   en.wikipedia.org/wiki/Pegmatite

   Quartz crystals with masses measured in thousands of pounds [5] and micas over 10 meters (33 ft) across and 4 meters (13 ft) thick have been found. [8] Spodumene crystals over 12 meters (40 ft) long have been found in the Black Hills of South Dakota , and beryl crystals 8.2 meters (27 ft) long and 1.8 meters (6 ft) in diameter have been found ...