Halogen lamps lamp is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine.
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Halogen lamps lamp is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine.
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The first Halogen lamps used only tungsten for filament supports, but some designs use molybdenum – an example being the molybdenum shield in the H4 twin filament headlight for the European Asymmetric Passing Beam.
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Halogen lamps made for 12 to 24 volt operation have good light outputs, and the very compact filaments are particularly beneficial for optical control .
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Halogen lamps are manufactured with enough halogen to match the rate of tungsten evaporation at their design voltage.
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Undoped quartz halogen lamps are used in some scientific, medical, and dental instruments as a UV-B source.
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Halogen lamps must run at much higher temperatures than regular incandescent lamps for proper operation.
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Halogen lamps torcheres have been banned in some places, such as dormitories, because of the large numbers of fires they have caused.
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Halogen bulbs operate at high temperatures and the tall height of the lamps brings them near flammable materials, such as curtains.
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Halogen lamps are available in a series of different shapes and sizes, and are designated according to a coding system that specifies the diameter of the bulb as well as whether or not the bulb has a built-in infrared-transparent dichroic reflector.
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Many such lamps have designations that begin with the letter "T" to indicate that they are "tubular" followed by a number indicating the diameter of the tube in eighths of an inch: a T3 bulb, then is a tubular halogen bulb that is.
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Tungsten-halogen lamps are frequently used as a near-infrared light source in Infrared spectroscopy.
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From 2007 onward, the halogen lamps were replaced with LEDs, due to the much longer lifespan, about ten times longer for LED over incandescent.
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Halogen lamps are the heating-elements in halogen ovens and ceramic cooktops.
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Two or three small halogen lamps can produce all the heat needed in an enclosure and are recognized by the animals as sources of heat preventing curious individuals from attempting to touch them.
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Banks of powerful tubular halogen lamps were used to simulate the heat of re-entry of space vehicles.
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Fixed-mount lamps are used in indoor and outdoor flood lighting, although improvements in LED systems are displacing halogen lamps.
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Round spotlights with built-in multifaceted reflector Halogen lamps are widely used in residential and commercial lighting.
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Tubular halogen lamps provide a large quantity of light from a small source and so can be used to produce powerful flood lamps for architectural lighting effects, or for lighting large areas outdoors.
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Tungsten halogen lamps are used in the majority of theatrical and studio fixtures, including Ellipsoidal reflector spotlights, Source Four, and Fresnels.
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Projection Halogen lamps are used in motion-picture and slide projectors for homes and small office or school use.
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Halogen lamps are sometimes used for inspection lights and microscope stage illuminators.
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Halogen lamps were used for early flat-screen LCD backlighting, but other types of lamps are now used.
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