AVIXA CTS-D: Lighting Specifications Exam
Questions and Answers
Incident Light Meter / Illuminance Meter - Correct Answers -Measures light coming
directly from a source, such as a light bulb, projector, or monitor
Spot Meter / Luminance Meter - Correct Answers -Measures the light that is reflected off
an object back to the meter and can vary based upon the attributes of the subject being
measured.
Video Conference Floor reflectance percentage - Correct Answers -Less than 60%
reflectance
Video conference Ceiling reflectance - Correct Answers -70-90% reflectance
Video conference windows reflectance recommendations. - Correct Answers -Blackout
shades are required for all windows; interior finish of shades as per vc wall finishes
Video Conference Whiteboards reflectance recommendation - Correct Answers -40-
60% reflectance grey, not white
Video Conference Table reflectance recommendations - Correct Answers -20-60%
reflectance; monolithic, neutral colors such as grey, buff, taupe, and lighter; modesty
panels for multi-level rooms; no specular finishes; avoid rectangular shape
Luminance - Correct Answers -Light emitted or reflected from an object in a given
direction, measured in Candelas per square meter (cd/m2, also referred to as a 'nit') or
foot-Lambert (fL). [1 nit = 0.292 fL].
Illuminance - Correct Answers -Light falling on a surface, measured in Lux (lx) or Foot-
Candle (ft-c or fc) [1 lux = 0.09 fc]. Not visible to human eye other than in the form of
reflected luminance.
Lumen - Correct Answers -Is a measure of the light quantity emitted from a constant
light source across one square meter.
Foot-Candle (fc) - Correct Answers -An English unit of measurement expressing the
intensity of light illuminating from an object. The illumination from one candle falling on a
surface of 1 square foot at a distance of 1 foot.
, Lux - Correct Answers -is a contraction of the words luminance and flux. It is equal to
one lumen/square meter
How many Lux equal one footcandle? - Correct Answers -10.78 lux
Candela - Correct Answers -Is the luminous intensity of a source that emits
monochromatic radiation of frequency 540 × 1012 hertz, and has a radiant intensity in
that direction of 1 ⁄ 683 watt per steradian.
CCT - Correct Answers -Correlated Color Temperature,
The color appearance of a light source as measured on the Kelvin scale
Measures the light color the lamp is emitting as a single number. Typically, most
commercial light sources range from 2700K to 6500K, with lamp CCTs appearing
"warm" below 3200K and "cool" above 4000K.
1900K CCT - Correct Answers -Candle Light
2200K CCT - Correct Answers -High Pressure Sodium Lamp
3200K-3400K CCT - Correct Answers -Tungsten Lamp
4200K CCT - Correct Answers -Cool White Fluorescent Bulb
5400K CCT - Correct Answers -Daylight
5500K CCT - Correct Answers -Noon Direct Daylight, Cloudless sky
6500K - Correct Answers -SMPTE reference white
CIE Chart - Correct Answers -Depicts the average gamut of human vision. Chromaticity
Diagram
Color Temperature - Correct Answers -is the approximate quantification of the color of
"white" light, as rated on a numerical scale. Low color temperature light (~2000K) has a
warm (red-ish) look while light with a high color temperature (~6000K) has a colder
(blue-ish) appearance.
CRI - Correct Answers -Color Rendering Index
The effect a light source has on the perceived color of objects relative to an
incandescent source of the same correlated color temperature, which has a color
rendering index of 100.
Questions and Answers
Incident Light Meter / Illuminance Meter - Correct Answers -Measures light coming
directly from a source, such as a light bulb, projector, or monitor
Spot Meter / Luminance Meter - Correct Answers -Measures the light that is reflected off
an object back to the meter and can vary based upon the attributes of the subject being
measured.
Video Conference Floor reflectance percentage - Correct Answers -Less than 60%
reflectance
Video conference Ceiling reflectance - Correct Answers -70-90% reflectance
Video conference windows reflectance recommendations. - Correct Answers -Blackout
shades are required for all windows; interior finish of shades as per vc wall finishes
Video Conference Whiteboards reflectance recommendation - Correct Answers -40-
60% reflectance grey, not white
Video Conference Table reflectance recommendations - Correct Answers -20-60%
reflectance; monolithic, neutral colors such as grey, buff, taupe, and lighter; modesty
panels for multi-level rooms; no specular finishes; avoid rectangular shape
Luminance - Correct Answers -Light emitted or reflected from an object in a given
direction, measured in Candelas per square meter (cd/m2, also referred to as a 'nit') or
foot-Lambert (fL). [1 nit = 0.292 fL].
Illuminance - Correct Answers -Light falling on a surface, measured in Lux (lx) or Foot-
Candle (ft-c or fc) [1 lux = 0.09 fc]. Not visible to human eye other than in the form of
reflected luminance.
Lumen - Correct Answers -Is a measure of the light quantity emitted from a constant
light source across one square meter.
Foot-Candle (fc) - Correct Answers -An English unit of measurement expressing the
intensity of light illuminating from an object. The illumination from one candle falling on a
surface of 1 square foot at a distance of 1 foot.
, Lux - Correct Answers -is a contraction of the words luminance and flux. It is equal to
one lumen/square meter
How many Lux equal one footcandle? - Correct Answers -10.78 lux
Candela - Correct Answers -Is the luminous intensity of a source that emits
monochromatic radiation of frequency 540 × 1012 hertz, and has a radiant intensity in
that direction of 1 ⁄ 683 watt per steradian.
CCT - Correct Answers -Correlated Color Temperature,
The color appearance of a light source as measured on the Kelvin scale
Measures the light color the lamp is emitting as a single number. Typically, most
commercial light sources range from 2700K to 6500K, with lamp CCTs appearing
"warm" below 3200K and "cool" above 4000K.
1900K CCT - Correct Answers -Candle Light
2200K CCT - Correct Answers -High Pressure Sodium Lamp
3200K-3400K CCT - Correct Answers -Tungsten Lamp
4200K CCT - Correct Answers -Cool White Fluorescent Bulb
5400K CCT - Correct Answers -Daylight
5500K CCT - Correct Answers -Noon Direct Daylight, Cloudless sky
6500K - Correct Answers -SMPTE reference white
CIE Chart - Correct Answers -Depicts the average gamut of human vision. Chromaticity
Diagram
Color Temperature - Correct Answers -is the approximate quantification of the color of
"white" light, as rated on a numerical scale. Low color temperature light (~2000K) has a
warm (red-ish) look while light with a high color temperature (~6000K) has a colder
(blue-ish) appearance.
CRI - Correct Answers -Color Rendering Index
The effect a light source has on the perceived color of objects relative to an
incandescent source of the same correlated color temperature, which has a color
rendering index of 100.
