Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

WELL AP v1_ LP > Light Concept > Flashcards

Light Concept Flashcards

1
Q

How many adults have chronic sleep disorders?

A

50-70 million

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What specific part of the body acts as a main internal clock that synchronizes with clocks in peripheral tissues and organs?

A

Suprachiasmatic nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What 6 health risks are sleep deprivation linked to?

A
  • diabetes
  • obesity
  • depression
  • heart attack
  • hypertension
  • stroke (ictus)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Rods (Photoreceptive Cells) facilitate what type of vision?

A
  • peripheral vision
  • dim lighting (luce soffusa)
  • green-blue sensitivity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Cones (Photoreceptive Cells) facilitate what type of vision?

A
  • color perception
  • daytime light
  • green-yellow
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are ipRGCs (Photoreceptive Cells) and what type of vision?

A

Intrinsically Photosensitive Retinal Ganglion Cells

  • See light over long-term
  • Used in circadian rhythm
  • Sensitivity to teal blue
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are external cues (stimoli) called, including light, that align physiology to solar day?

A

Zeitgebers

(circadian photo entrainment)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Light exposure in the late night/early morning (4-6am) leads to ____.

A

phase advance - shifts our rhythms forward

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Light exposure in the late afternoon/early night (4-6pm) shifts our rhythms ____.

A

backward - phase delay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

F53 - Visual Lighting Design (Visual for Focus, Brightness Management)

p1 a- On workstations ambient light levels of ____ lux is sufficient, as measured at __ inches above the floor.

p1 b - Ambient light system needs to be zoned in independently controlled banks no larger than ____ m2 or ___% of open floor area

p1 c- If ambient light is below 300 lux, then task lights providing ___ to ___ lux need to be provided at work stations

A

p1a-

215 lux (30 inches)

p1b-

46, 5 m2 (500 ft2) or 20% of floor area

p1c-

300-500 lux

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

F53 - Visual Lighting (Visual for Focus, Brightness Management)

p 2 - A narrative is provided that describes how 2 of 4 of the following will be considered:

A
  1. brightness contrasts adjacent and non-adjacent spaces
  2. brightness contrasts main rooms and ancillary spaces
  3. brightness contrasts in the same room such as desk surface and computer screen
  4. how brightness is distributed on the ceiling
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

F54 - Circadian Lighting Design (Melanopic)

What is EML and what is the desired level? Which requirements must be met (one of the two)?

A

Equivalent Melanopic Lux - A unit of measure of biological effect of light on humans melanopsins

EML = L*R (lux*ratio melanopic)

One of the two:

  1. verify that > 200 EML are provivded for 75% workstations, measured on 1,2 m (4’) above floor, 4 hrs/day
  2. verify > 150 EML are provided for all workstations by the electric lights on the vertical plane forward occupant’s view
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

F54 - Circadian Lighting Design (Melanopic)

Standard to refer confirming that maintained illuminance will be adequate on vertical surfaces

A

ANSI/IES American National Standard Practice for Office Lighting (RP-1-12)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

F55. Electric Light Glare (Luminaire Shielding, Glare Minimization)

p1 - lamp shielding reqs to reduce glare (4 levesl)

A

Luminance of the lamp (cd/m2):

< 20k = no shielding

20k to 50k = 15° (degrees of the shielding)

50k to 500k = 20°

> 500k = 30°

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

F55. Electric Light Glare (Luminaire Shielding, Glare Minimization)

p2 - Workstations, desks must met one of the the following requirements (2)

A
  1. Luminaires more than 53° above the center of view have luminances < 8,000 cd/m².
  2. UGR < 19 for workstations, desks and other seating areas

UGR is a level of glare discomfort

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

F56 - Solar Glare (View window, Dayligth (window) Management)

p1 - For glazing of view window (< 2,1 m - 7 ft above floor) which are the possible (3) options?

p2 - For glazing of daylight window (> 2,1 m - 7 ft above floor) which are the possible (5) options?

A

p1-

a. interior window shading or blinds (manual or automatic control)
b. exterior shading systems (manual or automatic control)
c. variable opacity glazing (reduce 90% the transmissivity)

p2-

a. interior window shading or blinds (manual or automatic control)
b. exterior shading systems (manual or automatic control)
c. variable opacity glazing
d. interior light shelves
e. a film of micro-mirrors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

F57 - Low-glare Workstation Design

Computer screens at desks located within ____ from windows should be orientable of ____ degrees perpendicular to window plane and overhead luminaires_________

(Avoidance direct reflection)

A

4,5 m (15 ft)

20 degrees

not be directed at computer screen

18
Q

F58 - Color Quality (Color Rendering Index CRI)

All electric light to accurately oirtrat colors should meet the following (2):

A

CRI Ra (R1-R8) > 80

CRI R9 > 50

CRI is a comparison of the appearance of 8 to 14 colors under a light blackbody source

19
Q

F59 - Surface Design (Surface Reflectivity)

What are the Light Reflectance Value (LRV) limits for: ceilings, wall, furniture?

A

Ceilings - LRV 0.8 for 80% of surface

Walls - LRV 0.7 for 50%

Furniture - LRV 0.5 for 50%

LRV is like Albedo with value from 0 (nero) to 1 (bianco)

20
Q

If you want to promote alertness and activity in a workspace, should you pick a surface with a high or low LRV?

A

Higher LRVs mean they reflect more light

21
Q

F60 - Automated Shading and Dimming (Automated sunlight control, Responsive light control)

p1 - All windows larger than ___ have shading devices that automatically engage when light sensors indicate possible glare at workstations

p2 - All fixtures except decorative fixtures are programmed to automatically dim to level ___when unoccupied.
Fixtures are programmed to dim____as daylight levels increase

A

p1-

0,55 m2 (6 ft2)

p2-

20%

continuously

22
Q

F61 - Right to light (Lease depth, Windows access)

p1- ___% of ALL regularly occupied spaces must be within ___ of windows

p2 - ____% of workstations are within ____of an atrium/window (2 standards)

A

p1-

  • 75% occupied spaces→ within 7,5 m (25 ft)

p2-

  • 75% workstations → within 7,5m (25 ft)
    and
  • 95% workstations → within 12,5 m (41 ft)
23
Q

F62 - Daylight Modeling

What describes the minimum sunlight levels?

What describes the maximum sunlight levels?

(Healthy sunlight exposure)

A

Minimum

sDA per > 55% spaces

sDa = ≥ 300 lux per 50% of period analysed

(Spacial Daylight Autonomy )

  • *Maximum**
  • *ASE per < 10% spaces**

ASE = ≥ 1000 lux for 250 hours annually

(Annual Sunlight Exposure)

ovvero 10% ASE

24
Q

F63 - Daylighting Fenestration (Window sizes, Windows Transmittance, Uniform Colour Transmittance)

p1 a - window- wall ratio on the external elevation of a building?

p1 b - How much of window area should be “daylight windows”?

A

a. 20-60% (greater than 40% glass requires external shading)
b. 40 - 60%

25
Q

F63 - Daylighting Fenestration (Window sizes, Windows Transmittance, Uniform Colour Transmittance)

p2 a - All daylight windows should have a visible transmittance (VT) ≥ ____%

p2 b - All view windows should have a visible transmittance (VT) ≥ ____%

A

a. daylight windows VT ≥ 60%
b. view windows VT ≥ 50%

26
Q

F63 - Daylighting Fenestration (Window sizes, Windows Transmittance, Uniform Colour Transmittance)

p3 - Uniform colored glass window daylight need a transmittance (wavelenghts 400nm-650nm) that not vary more than a factor of ___.

A

2

es. if the lowest VT is 40% at 460nm and the highest VT is 70% at 600nm the glazing would be acceptable.

27
Q

The total luminous output of a light source, measured in lumens and weighted to the visual sensitivity of the human eye.

A

Luminous flux

28
Q

The amount of light incident on a given surface measured in lux or footcandles.

A

Illuminance (Illuminamento)

29
Q

A measurement of how bright a surface or light source will appear to the eye, measured in candela per square meter (cd/m2) or footlamberts.

A

Luminance (Luminanza)

30
Q

A rating of how much usable light is reflected or absorbed by a given surface, with values ranging from 0 (0%) to 1 (100%).

A

Light reflectance value (LRV)

31
Q

A lamp that produces light from an arc tube.

A

High-intensity discharge (HID) lamp

32
Q

A lamp with semiconductor devices that produce visible light when an electrical current passes through them.

A

Light-emitting diode (LED) lamp

33
Q

A measure of light that is used to quantify how much a light source will stimulate the light response of melanopsin.

A

Equivalent melanopic lux (EML)

34
Q

A percentage of floor space in which a minimum light level can be met completely for some proportion of regular operating hours by natural light. (term)

A

Spatial daylight autonomy (sDA)

35
Q

An index that features a comparison of the appearance of 8 to 14 colors under a light source in comparison to a blackbody source of the same color temperature

A

Color rendering index (CRI)

36
Q

Glazing that has the ability to control the amount of light passing through it. Also known as smart glass.

A

Variable opacity glazing

37
Q

What is the correct term for keeping the body’s internal clocks synchronized?

A

Circadian photoentrainment

38
Q

What’s the wavelenghts of visible light range?

A

400 - 700 nm

39
Q

Which is the number of the Features Light?

A

53 - 63

53 - 56 (P)

57 - 63 (O)

40
Q

What verification methods are required to demonstrate that Feature 54 Circadian Lighting Design has been achieved

A

Letter of assurance from the Architect, and an on-site spot measurement by the WELL Assessor

41
Q

Percentage of space in which the light level from direct sun alone, exceeds a pre-defined threshold?

A

Annual Sunlight Exposure (ASE)

42
Q

The only Feature in the Light Concept to include a parte that is a precondition for all three projects

A

F55 Electric Light Glare Control

WELL AP v1_ LP (25 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions