Search results
Results from the WOW.Com Content Network
To learn more about light therapy lamps — also commonly called SAD lamps, or ironically, happy lamps — and how to shop for them, we consulted experts, who also gave us tips for using them.
But the purest and most sought-after form is the quartz crystal (Sphatika), a natural stone not carved by man but made by nature, gathered molecule by molecule over hundreds, thousands or millions of years, grown as a living body grows, but infinitely more slowly. Such a creation of nature is itself a miracle worthy of worship."
Typically, an incandescent lamp has a tungsten filament surrounded by an inert gas. This is all encapsulated by a bulb. The inert gas stops the formation of anything that could darken the bulb, such as carbon. The bulb is usually made from Pyrex or synthetic quartz. Incandescent lamps also have a base.
[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 ...
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).
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 ...
The development of quartz halogen linear lamps allowed much higher power density up to 200 watts/inch of lamp (8 w/mm), useful for industrial heating, drying and processing applications. [3] By adjusting the voltage applied to incandescent lamps, the spectrum of the radiated energy can be made to reduce visible light and emphasize infrared ...
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 ...