Lighting Metrix
What is the unit of Luminance?
cd/m2
What is color temperature measured in?
Kelvin
Conceptual design characteristics?
What is a characteristic of a reflector?
a prismatic lens with a white, gold or silver surface
What is a candlepower distribution?
A diagram showing the angle distribution of light intensity measured in Candelas
What two units can Illuminance be expressed in?
What is the difference between CT and CCT?
CT is color temperature without connection
CCT is correlated to the blackbody locus
Characteristics for Pragmatic Concept?
Applications driven
performance and visual comfort
How does a surface diffuse light?
scattering light in all directions
What is the name of an opening in a luminaire where light exits?
Aperture
What is the definition of Luminous Flux?
Light emitted in all directions by light source
Name two color rendering types
Fidelity, Preference, Discrimination
What is the main aspect of an Aesthetic Concept?
a list of adjectives for guidance of description
What percentage of light is directed upward and how much is directed downward in a Direct/Indirect Luminaire?
60 - 90% down
10 - 40% up
what is a photometric report?
information for performance of a luminaire
What is the unit of Exitance?
lm/ft2
To be a very low saturation what Rg values range would the color be?
60 and lower
Define the concept in the image
Conceptual Design
What angle does the offending zone define?
55 - 90 degrees from nadir
What is the difference between a lighting plan and a reflected ceiling plan?
A lighting plan contains a mixture of architectural elements and the layout of luminaires
The Reflected Ceiling Plan shows all items on the ceiling and is used with construction documents
What does Lminous Intensity stand for, what is it's Symbol and the unit?
How much light is sent in particular direction, I, candela
Why is TM-30 better than CRI?
99 colors instead of the limited number from CRI and more factors going into rendering process
define this conceptual image
What are the advantages of indirect lighting?
soft, high level of uniformity, "Lift" and Provide Volume to space
What direction does the light in the luminaire have?
Direct - Indirect