NCIDQ | LIGHTING Exam | Questions and
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Terms in this set (289)
Lamp The correct term for the manufactured unit that
produces light is a LAMP.
Do not confuse it with FIXTURE.
common lamps Incandescent
Halogen
Fluorescent
CFL or Compact Fluorescent Lamp
Metal Halide
High Pressure Sodium
Specialty
,CRI Color Rendering
A measure of lighting quality.
This measure is based on an index that ranges from
1-100 with natural daylight and halogen lighting
being 100 CRI
Objects (such as artwork,
jewelry, fabrics) illuminated with halogen lamps
that have a high CRI, will appear more true to life.
Color of objects can be perceived more accurately
under lamps with a high CRI. Another wonderful
side effect of high CRI light sources is that they
produce a higher perceived level of light (they look
brighter) which in turn makes them more energy
effective (you save money).
Color Rendering Of Common Lamps Incandescent 100%
Halogen 100%
Fluorescent 60% up to 92%
Metal Halide 65% up to 92%
High Pressure Sodium 21% up to 85%
Color Temperature is a measure of the apparent color of the light
source (color appearance).
It is expressed
in Kelvin; the lower the color temperature, the
warmer the apparent color, and the higher the
color temperature, the cooler the apparent color.
(a 2800K source will be warmer than a 600K
source.)
, Light Source + Color Temperature Clear blue sky 12,000
Overcast sky 7,000
Sunlight 5,000
Metal Halide 4,500
Solux 3,500 to 4,700
Halogen 3,000
House Lamp 2,500
Candle Flame 1,500
Consider and compare the following Cost
when making an informed choice of Life
lamp Wattage
type: Output (candela, candle power, or lumens)
CRI
Color temperature
Ambient lighting general, overall illumination that:
• Enables one to move about easily and safely
• Defines the space
• Makes the room seem larger
• Makes the space more comfortable by balancing
the brightness of surfaces and objects in the field
of view.
General lighting that brightens objects and
surfaces in the lower part of the room creates a
feeling of warmth and intimacy, whereas indirect
lighting, directed to the upper walls and ceiling,
gives the space a cooler, quieter, more spacious
look.
Answers | Verified Solutions | 2026 Edition | Pass
Guaranteed
Save
Terms in this set (289)
Lamp The correct term for the manufactured unit that
produces light is a LAMP.
Do not confuse it with FIXTURE.
common lamps Incandescent
Halogen
Fluorescent
CFL or Compact Fluorescent Lamp
Metal Halide
High Pressure Sodium
Specialty
,CRI Color Rendering
A measure of lighting quality.
This measure is based on an index that ranges from
1-100 with natural daylight and halogen lighting
being 100 CRI
Objects (such as artwork,
jewelry, fabrics) illuminated with halogen lamps
that have a high CRI, will appear more true to life.
Color of objects can be perceived more accurately
under lamps with a high CRI. Another wonderful
side effect of high CRI light sources is that they
produce a higher perceived level of light (they look
brighter) which in turn makes them more energy
effective (you save money).
Color Rendering Of Common Lamps Incandescent 100%
Halogen 100%
Fluorescent 60% up to 92%
Metal Halide 65% up to 92%
High Pressure Sodium 21% up to 85%
Color Temperature is a measure of the apparent color of the light
source (color appearance).
It is expressed
in Kelvin; the lower the color temperature, the
warmer the apparent color, and the higher the
color temperature, the cooler the apparent color.
(a 2800K source will be warmer than a 600K
source.)
, Light Source + Color Temperature Clear blue sky 12,000
Overcast sky 7,000
Sunlight 5,000
Metal Halide 4,500
Solux 3,500 to 4,700
Halogen 3,000
House Lamp 2,500
Candle Flame 1,500
Consider and compare the following Cost
when making an informed choice of Life
lamp Wattage
type: Output (candela, candle power, or lumens)
CRI
Color temperature
Ambient lighting general, overall illumination that:
• Enables one to move about easily and safely
• Defines the space
• Makes the room seem larger
• Makes the space more comfortable by balancing
the brightness of surfaces and objects in the field
of view.
General lighting that brightens objects and
surfaces in the lower part of the room creates a
feeling of warmth and intimacy, whereas indirect
lighting, directed to the upper walls and ceiling,
gives the space a cooler, quieter, more spacious
look.
