Sources & Auxiliaries
 
Last Update: November 1, 2011
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Incandescent Lamps

A nickname for an incandescent lamp is a “hot wire in a bottle”.  The “wire” or filament, heated to incandescence by the flow of electrical current produces the light, while the “bottle”, the glass or quartz bulb around the filament provides a proper thermal and chemical environment for the particular light output, lamp life and efficacy that the lamp is designed to produce.  These basic characteristics are explored and discussed in this section, along with a more detailed review of incandescent lamp types, efficiency standards and emerging technologies.

Science of Incandescent Lamps
There are two major types of incandescent lamps: standard and tungsten-halogen usually just called halogen. 
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Incandescent A-Lamps  
The most-widely used and familiar incandescent lamp shape is the so-called “A-line”. 
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Incandescent Reflector Lamps 
Similar legislative requirements have already affected incandescent and halogen reflector lamps (R, PAR, ER and BR shapes)   Federal requirements, which became effective on June 16, 2008, call for reflector lamps to have…  
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Tungsten-Halogen Incandescent Lamps
Tungsten-halogen lamps can be simply described as a “better way to make an incandescent lamp” where “better” can mean the improvement of several  performance factors. 
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Incandescent Lamp Dimming
Standard incandescent and tungsten-halogen lamps, like other incandescent lamps, can be easily dimmed over their full range of output with voltage control or phase control (electronic) dimmers.
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Incandescent Lamps – Application Guidelines
Considering the relatively low efficacy of incandescent and even incandescent-halogen and halogen IR lamps, are there any applications where incandescent lamps can be energy efficient – that is, will they use the least amount energy for a given application?
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