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Ampere
(A or Amp)
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The unit of measure for electrical current. Basic formula for finding Amp draw (Amps = watts ÷ volts)
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Candela
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A unit of measurement for the luminous intensity of a lamp at a specific spot in the beam. Dichroic A glass reflector and bulb assembly that allows heat to dissipate through the reflector and away from the bulb thus increasing bulb life. |
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Dual Filament Bulb
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A bulb having two filaments encased in one glass tube. In the case of halogen headlight bulbs with dual filaments, one filament for the low beam and one filament for the high beam. The most common dual filament halogen headlight bulbs are H4, HB2, 9007, and 9004. |
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Dual Lamp System
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A PIAA innovation that places two types of auxiliary light systems into one housing, usually a driving light and a fog light. |
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High Intensity Discharge
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A light source in which light is produced by a stabilized arc that burns at a much higher color temperature which creates a whiter light output than a standard halogen bulb. This arc is generated with an igniting system and ballast. |
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Kelvin
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Color temperature is a unit of measure for the color of light it is not necessarily related to the heat of the light source. A higher color temperature represents a color closer to actual sunlight. |
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Lens Fluting
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A process in lamp design that molds the lens to control the beam pattern by deflecting the light to the desired point in the beam. Lens fluting usually looks like vertical cuts in the lens. |
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Lumens
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A unit of measurement for the amount of light that a bulb puts out. Example: common light bulbs emit approximately 170 candela per 10 watts of electricity. |
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Multi Surface Reflector
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MSR, A reflector designed to control the beam pattern with a computer designed surface to project the light precisely to the desired point in the beam without the use of fluting. |
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NHTSA, D.O.T.
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National Highway Traffic Safety Administration, Department of Transportation. Sets the laws and guidelines for the preservation of safety on public highways. |
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Projector Lens
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An ellipse shaped lens that concentrates a beam of light coming from a set back bulb and reflector. The beam is usually controlled with a shield to give the beam a very sharp cut off point. This makes a great fog light or headlight low beam. |
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S.A.E.
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Society of Automotive Engineers. Publishes the recommended practices, design specifications and testing procedures for all automotive systems. |
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Xenon
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The gas used in H.I.D. systems that produce the extreme white color. Xenon gas is also used in some halogen bulbs to produce a whiter light and to keep deposits off the glass tube. |
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XTRA
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A PIAA term used to designate high efficiency bulbs that are designed to produce greater light output than its rated power consumption. (Example 55watts = 85watts of light output) |