IDFX LIGHTING ACTUAL TEST BANK
COMPLETE QUESTIONS AND ANSWERS
GRADED A PLUS SUCCESS GUIDE
●● common lamps
Answer: Incandescent
Halogen
Fluorescent
CFL or Compact Fluorescent Lamp
Metal Halide
High Pressure Sodium
Specialty
●● CRI
Answer: 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
Answer: Incandescent 100%
Halogen 100%
Fluorescent 60% up to 92%
Metal Halide 65% up to 92%
High Pressure Sodium 21% up to 85%
●● Color Temperature
Answer: 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
Answer: 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 when making an informed
choice of lamp
type:
Answer: Cost
Life
Wattage
Output (candela, candle power, or lumens)
CRI
, Color temperature
●● Ambient lighting
Answer: 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.
●● Task Lighting
Answer: light to work by
Task lighting illuminates areas where work is performed
Paper work and reading generally require plentiful, well-diffused light
coming from
over the shoulder or from the side. For kitchen and hobby tasks, a
concentrated light from above usually
COMPLETE QUESTIONS AND ANSWERS
GRADED A PLUS SUCCESS GUIDE
●● common lamps
Answer: Incandescent
Halogen
Fluorescent
CFL or Compact Fluorescent Lamp
Metal Halide
High Pressure Sodium
Specialty
●● CRI
Answer: 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
Answer: Incandescent 100%
Halogen 100%
Fluorescent 60% up to 92%
Metal Halide 65% up to 92%
High Pressure Sodium 21% up to 85%
●● Color Temperature
Answer: 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
Answer: 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 when making an informed
choice of lamp
type:
Answer: Cost
Life
Wattage
Output (candela, candle power, or lumens)
CRI
, Color temperature
●● Ambient lighting
Answer: 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.
●● Task Lighting
Answer: light to work by
Task lighting illuminates areas where work is performed
Paper work and reading generally require plentiful, well-diffused light
coming from
over the shoulder or from the side. For kitchen and hobby tasks, a
concentrated light from above usually
