Tungsten lamp


  • Webster's Revised Unabridged Dictionary
    • Tungsten lamp An electric glow lamp having filaments of metallic tungsten, and contained in a glass bulb which is evacuated or has an inert gas, to avoid oxidation of the tungsten; a common form of light bulb. Such lamps, owing to the refractory nature of the metal, may be maintained at a very high temperature and require an expenditure of only about 1.25 watts per candle power, depending on the total wattage and the design of the bulb. By mid-20th century tungsten lamps became the most common type of incandescent (as contrasted with fluorescent) lamp; thus the phrase incandescent lamp or incandescent light typically refers to a tungsten lamp.
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In literature:

And I'll use a tungsten filament lamp in the sending booth.
"Tom Swift and his Photo Telephone" by Victor Appleton
A recent rival of tungsten both as a filament for lamps and hardener for steel is molybdenum.
"Creative Chemistry" by Edwin E. Slosson
The luminous efficiency of the tungsten lamp equipped with such a tinted bulb is still about twice as great as that of the carbon-filament lamp.
"Artificial Light" by M. Luckiesh
In its place was a 100-watt tungsten lamp whose rays made the white table cloth fairly glisten.
"Electricity for the farm" by Frederick Irving Anderson
Tungsten, in incandescent lamps, 231.
"Common Science" by Carleton W. Washburne
C. Spectral energy curve of tungsten (gas-filled) glow lamp.
"The Nature of Animal Light" by E. Newton Harvey
Ordinary arc lamps, and even flame arc lamps, are being displaced by the modern high-candle-power gas-filled tungsten lamp.
"The New Gresham Encyclopedia" by Various
Then Ruth touched the trigger of the big tungsten lamp, and the spotlight shot the herd at about the middle of its advance wave.
"Ruth Fielding In the Saddle" by Alice B. Emerson
Tungsten lamps are giving good satisfaction for farm use.
"Farm Mechanics" by Herbert A. Shearer
How many candle power should a 20-watt tungsten lamp give if its efficiency is one watt per candle power?
"Physics" by Willis Eugene Tower

In news:

The full line of Lok -it quick exchange lamps are currently available in metal halide and tungsten halogen versions.
Osram's full line of Lok -it quick exchange lamps are currently available in metal halide and tungsten halogen versions.
In my last column I reviewed some of the details of lighting instrument retrofitting with the intent of applying these details to the replacement of traditional tungsten filament lamps with fixtures containing solid-state lighting engines.

In science:

Flat-field images were made using a tungsten filament lamp internal to Phoenix.
Detections of Ro-Vibrational H$_2$ Emission from the Disks of T Tauri Stars
In short, the design is very similar to the tunable spectrograph concept that is shown in Ref. 7, Fig. 10. A commercial monochromator with R ≈ 240 at 500 nm is used containing a 100 W quartz tungsten halogen (QTH) lamp as well as a 30 W deuterium lamp that are both constant in time at the (cid:46) 1% level.
Methods for evaluating the performance of volume phase holographic gratings for the VIRUS spectrograph array