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Job:02-30056 Title: RP-Interior Design Reference and Specification
#175 Dtp:216 Page:223
Job:02-30056 Title: RP-Interior Design Reference and Specification
#175 Dtp:216 Page:222
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Articial Light
Text
yields white light. Varying combinations of the three colors can produce a full spectrum of
color options. LEDs have the additional advantage of producing no heat. Currently, LEDs are
used in interior design to create desired effects such as accenting a reveal or washing a wall
with colored light. As the technology advances, it will become more affordable and eventually
be applied to general purpose lighting.
LIGHTING TERMINOLOGY
Ballast: Small device that controls the ow of current by providing the required starting voltage
and then reducing the current during operation.
Correlated Color Temperature (CCT): Spectral characteristic of a light source, measured in
Kelvins (K). The lower the temperature, the warmer the (yellow/red) tones; the higher the
temperature, the cooler the (blue) tones. Sunlight at dawn has a color temperature of 1900K
while a uniform overcast sky is 6527K.
Color Rendering Index (CRI): Scale from 1 to 100 that describes the affect of a light source on
an object or surface. The higher the index, the more natural and vibrant the object appears.
Dimming Ballast: Device used with uorescent lamps to vary the output of light by the use of a
dimmer control.
Efcacy, or Luminous Efcacy: Efciency in which electrical power is converted to light. Efcacy
measures the number of lumens emitted per watts consumed (lm/W).
Low-voltage Lamp: Incandescent lamp that operates with low voltage, ranging from 6 to 12 volts.
Luminance: Amount of light reected or transmitted by an object.
Transformer: Device designed to raise or lower electric voltage.
Although fiber-optic and LED lighting technologies have been around for a while, they are now
fixtures. It is also important to note that the illuminators need ventilation to release the heat
as long as uorescent lamps, they are too costly for use in general lighting. LEDs are available
in high intensities of red, green, and blue light, and the combination of all three colored lights
Fluorescent Tube–cool Compact Fluorescent Metal Halide High-Pressure SodiumFluorescent Tube–warm
Job:02-30056 Title: RP-Interior Design Reference and Specification
#175 Dtp:216 Page:223
Job:02-30056 Title: RP-Interior Design Reference and Specification
#175 Dtp:216 Page:222
(RAY)
218-223_30056.indd 223 3/4/13 7:52 PM
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