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Lighting > Quiz 1 > Flashcards

Quiz 1 Flashcards

1
Q

Light

A

Radiant Energy that is capable of exciting the retina and producing a visual sensations

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2
Q

Electromagnetic Spectrum

A

The human eye can see between 400 and 750 nanometers in the electromagnetic spectrum

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3
Q

Cornea

A

Produces 2/3 of the eyes focusing power. clear and washed by tears

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4
Q

Iris

A

Center opening of the eye that controls the amount of radiation entering the eye

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5
Q

Lens

A

double convex structure just behind the iris. Focuses the eye

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6
Q

Retina

A

Marks the end of the optical pathway and the beginning of the visual pathway

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7
Q

Fovea

A

a small area of the retina that provides detailed color vision in about two degree cone of the visual field

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8
Q

Rods & Cones

A

Each eye is said to have 140 million photoreceptors. 100 million rods and 40 million cones. Rods are activated primarily in lower illumination levels and cones are activated by bright light color and detail

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9
Q

Layered Lighting

A

Ambient Lighting
Task Lighting
Accent Lighting
Decorative Lighting

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10
Q

Ambient Lighting

A

provided all of the illumination in a space

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11
Q

Task Lighting

A

direct lighting that illuminates the work area

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12
Q

Daylighting and Task Daylighting

A

Task daylighting is also complemented by electric lighting as the sun goes down

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13
Q

Accent lighting

A

used to draw light to an area in a space or to highlight a particular object

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14
Q

Backlighting

A

Also known as silhouetting.

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15
Q

Control

A

Device that adjusts light levels

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16
Q

Grazing

A

Lighting technique that places lighting close to object or wall. It creates shadows and textures

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17
Q

Lamp

A

Light source that produces optical radiation

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18
Q

Lumen (lm)

A

Unit of measurement of light output of a lamp

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19
Q

Luminaire

A

Lighting system includes lighting source, housing, ballasts or drivers, transformer, controls, and mounting

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20
Q

Recessed Spot

A

Luminaire mounted in a ceiling or furniture

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21
Q

Solid State Lighting (SSL)

A

Illumination that operates with semi conductors (LED OLED)

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22
Q

Sustainable design

A

Built environment that focuses on products, and processes that protect the environment

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23
Q

Uplighting

A

Luminaire pointed upward for accent lighting

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24
Q

Veiling reflection

A

reduction in light contrast on a task that produces a reflected image on a surface

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25
7 phases of Lighting design process
``` Project Planning Programming Schematic Design Design Development Contract Documentation Contract Administration Evaluation ```
26
Charette
The group of people involved in the project gathered together to exchange information to create a cohesively designed space
27
Post Occupancy Evaluation
Data collection process that occurs at intervals after move in to determine the effectiveness of the design
28
Color Rendering Index
ranges from 0 to 100 | Higher the CRI the truer the color rendering
29
Color Constancy
is the ability of the eye to detect the correct color of an object, regardless of the color of the light source
30
Metamerism
light source have different Spectral Power Distributions, but appear to be the same color
31
Initial Lumens
amount of light output at the beginning of an installation
32
Mean Lumens
Average amount of light output of the life of the lamp
33
illuminance
The level of light that falls on a surface
34
Foot candles or Lux
the measurement of the amount of light that falls on a surface one foot from a candle.
35
Perceived Brightness
brightness is subjective to individuals and to spaces. An elderly person sees too much brightness as glare.
36
Glare
high levels of brightness are seen as glare in different lighting scenarios
37
Types of Glare
By origin: Direct Glare Indirect Glare By effect on people: Disability Glare Discomfort Glare
38
Direct Glare
occurs when light source is unshielded and high brightness
39
Indirect Glare
Where light is reflected from a glossy surface
40
Disability Glare
the effects of stay light in the eye where retinal contrast is reduced
41
Discomfort Glare
Distracting glare but can still see the object
42
Angle of Incidence
The angle formed when a ray of light striking a surface and a line perpendicular to the surface at point of impact
43
Transmission
Materials of luminaires let light pass through the luminaire
44
Direct Transmission
Light passes through glass
45
Diffused Transmission
Light passes through most of the material
46
Mixed transmission
light passes through a sand glass in a diffused manner
47
Chromaticity
Color temp of light
48
Color Temperature
indicated the degree of red or blue in the supplied by the light source
49
Lens
Transparent device the concentrates or directs light rays in various directions
50
Semi Specular Reflectance
This occurs when a partially shiny material causes light to be reflected primarily in one direction
51
Shade
A device, either opaque or translucent, that shields a bare lamp from view
52
Sunlight
generally seen as negative in an interior space because it is uncontrolled and unfiltered
53
Daylighting
used in lighting is specific to bringing natural light into a building to augment electric light sources and so save energy
54
Top lighting
Skylights, diffuse skylights, sawtooth clerestory, roof monitor, light tubes
55
Side lighting
Light shelves, shades, overs, exterior sunshades
56
Solar Geometry
the tracking of the sun in time and space
57
Candel power
intensity of a light source in a given direction is measured in candelas
58
Watt
the measurement of the amount of electricity drawn for a specific lamp
59
Lumens per Watt (lpw)
the amount of light output per watt of electricity drawn
60
High intensity discharge lamps
gas discharge arc lamps. Light is created by sending electricity from two electricity from two electrode through an ionized gas
61
Metal Halide Lamp
Ceramic Metal Halide uses ceramic instead of Quartz.
62
LED lighting
AKA Solid State Lighting- produces chemical reactions instead of the heating of filaments and gases
63
MacAdam Ellipses
Within each of the ellipses in the chromaticity scale, there is no noticeable difference in color.
64
How an OLED is made
by placing a series of organic thin films (organic crystals) between two conductors when electric current is applied, a bright light is emitted

Lighting (3 decks)

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