Week 5: Light✅ Flashcards

Question

What are the consequences of light deficiencies on circadian health? ## Footnote L03 CIRCADIAN LIGHTING DESIGN | OPTIMIZATION

Answer 1

Light deficiencies affect the **functioning of the circadian system** and **quality of sleep**, leading to issues such as **obesity**, **diabetes**, **depression**, and **metabolic disorders**. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 2

**Spectral properties**, **brightness levels**, **duration**, and **timing** of light exposure are essential to support **circadian response**. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 3

Light exposure on the vertical plane simulates the light entering the **eye** of the user, which is crucial for **stimulating the circadian system**. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 4

Exposure to bright light at night can cause **circadian phase disruption**, **sleep disorders**, and **negative health effects** like **breast cancer**. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 5

Electric lighting must achieve at least **150 EML** (**136 M-EDI(D65)**) for at least **four hours** by **noon** at a height of **18 in** (45 cm) above the work-plane for all workstations. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 6

To earn additional points, projects must achieve at least **240 EML** (**218 M-EDI(D65)**) OR **180 EML** (**163 M-EDI(D65)**) and comply with **L05 Part 1** or **L06 Part 1**. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 7

The light levels must be measured on the **vertical plane at eye level** to simulate the light entering the **eye of the occupant**, which is crucial for **circadian response**. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 8

Electric lighting in dwelling units must be **dimmable**, and **automated lighting** must be dimmed after **8:00 pm**. Light levels must also be achieved at a height of **55 in** (140 cm) in living rooms and kitchens. | Created with Chat-GPT ## Footnote *This information comes from Page 110-112 of the WELL V2*

Answer 9

The intent is to **minimize glare caused by electric light**. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 10

Glare can lead to **visual discomfort**, **eye fatigue**, **headaches**, **migraines**, and **visual impairment**, potentially causing accidents in the workplace. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 11

Individuals **under the age of 50** are more sensitive to glare. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 12

Strategies include **calculation of glare**, **choosing appropriate light fixtures**, and **lighting layout adjustments**. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 13

Luminance must not exceed **6,000 cd/m** at any angle between **45 and 90 degrees** from nadir. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 14

The UGR must be **16 or lower**. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 15

The UGR must be **19 or lower**. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 16

**Wall wash fixtures**, **concealed fixtures**, and **decorative fixtures** installed as specified by the manufacturer's data can be excluded. | Created with Chat-GPT ## Footnote *This information comes from Page 113-114 of the WELL V2*

Answer 17

The intent is to **provide daylight exposure indoors** through design strategies. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 18

Humans spend approximately **90% of their time indoors**. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 19

Daylight exposure has a **substantial impact on mood, circadian health, and productivity**, and its absence can disrupt circadian rhythms and reduce sleep quality. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 20

**Building design**, **facade design**, and **interior layout** have a substantial impact on the amount of daylight in indoor spaces. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 21

Indoor spaces with daylight exposure have been shown to have **fewer bacteria** compared to spaces without any light exposure. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 22

**70% of all workstations must be within 25 ft (7.5 m)** of transparent envelope glazing, or **envelope glazing must be no less than 15%** of the regularly occupied floor area. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 23

The visible light transmittance (VLT) must be **greater than 40%**. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 24

In each dwelling unit, **vertical envelope glazing must be no less than 15%** of the unit, or **no less than 25%** for additional points, with VLT greater than 40%. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 25

**70% of all workstations must be within 16 ft (5 m)** of transparent envelope glazing, or **envelope glazing must be no less than 25%** of the regularly occupied floor area. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 26

WELL Core Guidance can be achieved by **meeting these requirements in the whole building**. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 27

**All vertical transparent envelope glazing must have shading** that is either manually controllable by occupants or automated to prevent glare. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 28

**Manual shading must be controllable by occupants at all times** and shades must be regularly opened once a day for all days that the project is in use. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 29

**Shading that is automated to prevent glare** earns **2 points**. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 30

WELL Core Guidance can be achieved by **meeting these requirements in the whole building**. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 31

Projects can either **install shading in tenant spaces** or **provide a budget to tenants** tied to the implementation of feature requirements. | Created with Chat-GPT ## Footnote *This information comes from Page 115-117 of the WELL V2*

Answer 32

**Daylight simulation calculations are conducted to make informed decisions around fenestration and shading** to provide appropriate daylight exposure for occupants. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 33

**Exposure to daylight has a substantial impact on mood, circadian health, and productivity**, while lack of exposure is linked to disrupted circadian rhythms and decreased sleep quality. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 34

**Students perform better when they have access to windows that can be opened**. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 35

**Indoor daylight exposure can be optimized by conducting daylight simulations**, which inform choices for shading, fenestration design, and interior layout. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 36

**Indoor spaces with daylight exposure have been shown to have fewer bacteria** compared to spaces without any light exposure. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 37

**Regularly occupied spaces must achieve an average sDA300,50% for >55% of the floor area or a target illuminance of 28 fc (300 lux) for >50% of individual unit area** throughout 50% of daylit hours of the year. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 38

**To achieve higher points, average sDA300,50% must be >75% for regularly occupied floor area or a target illuminance of 28 fc (300 lux) for >50% of individual unit area**, with an average illuminance of 9 fc (100 lux) for >95% of individual unit area throughout 50% of daylit hours of the year. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 39

**Each dwelling unit must achieve an average sDA for >55% of the regularly occupied floor area or a target illuminance of 28 fc (300 lux) for >50% of individual unit area** throughout 50% of daylit hours of the year. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 40

**The default surface reflectances are: Ceilings: 80%, Walls: 50%, and Floors: 20%**. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 41

**The entire floorplate, except circulation areas in non-leased spaces, is considered regularly occupied**. | Created with Chat-GPT ## Footnote *This information comes from Page 118-120 of the WELL V2*

Answer 42

**The main intent of the Visual Balance feature is to create lighting environments that enhance visual comfort**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 43

**Fluctuating light levels can impact visual comfort, leading to eye fatigue and distraction from tasks, which decreases productivity and affects well-being**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 44

**Solutions include developing a lighting layout and operations schedule that complement the design, considering color temperature, daylight, and electric light**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 45

**Lighting should take into account the ages of users, tasks performed, and existing physical features in the space**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 46

**Thoughtful planning supports a visually comfortable lighting environment, enhancing ambience and energy efficiency goals**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 47

**Ambient lighting must meet at least three of the following: a) luminance contrast ratios no more than 10 between adjacent zones, b) illuminance uniformity ratio of at least 0.4, c) automatic changes in lighting characteristics over 10 minutes, d) consistent Correlated Color Temperature (CCT) within "+/-"200 K**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 48

**The minimum illuminance uniformity ratio required is 0.4 or 1:2.5 (minimum light level: average light level)**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 49

**Changes in lighting characteristics, such as light levels and color, should take place automatically over a period of 10 minutes**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 50

**Considerations include luminance ratios, illuminance uniformity on task planes, changes in lighting characteristics, and color temperature of lights used**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 51

**These requirements apply to all regularly occupied spaces and should be met in non-leased spaces, with additional points for leased spaces**. | Created with Chat-GPT ## Footnote *This information comes from Page 121-122 of the WELL V2*

Answer 52

**Enhance visual comfort and minimize flicker** for electric light. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 53

Low color rendering can **impact the ability to differentiate between objects** and **perceive surroundings accurately**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 54

Flicker has been associated with **eye strain, headaches, migraines,** and **epileptic seizures**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 55

Utilizing lighting fixtures that emit a **high quality of light** and do not display signs of **flicker** contributes to a **comfortable and healthy space**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 56

Light fixtures with higher CRI emit light that shows **colors realistically**, improving **people's perception of a space**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 57

All luminaires must meet at least one of the following: **CRI >=90**, **CRI >= 80 with R9 >= 50**, or **IES R >= 78**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 58

Luminaires must meet at least one of the following: **CRI >= 80** or **IES R >= 75**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 59

Tunable white lighting requirements are met at **1,000K intervals** from a minimum of **2,700K** to a maximum of **5,000K**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 60

**Decorative fixtures, emergency lights,** and **other special-purpose lighting** are excluded from these requirements. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 61

These requirements should be met in **non-leased spaces** and for an additional point, also in **leased spaces**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 62

All luminaires must meet at least one of the following: **Classified as "reduced flicker operation" per California Title 24**, **Recommended practices 1, 2, or 3 defined by IEEE standard 1789-2015 LED**, or **Pst LM <= 1.0 and SVM <= 1.6** for indoor applications per NEMA 77-2017. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 63

**Decorative lights, emergency lights,** and **other special-purpose lighting** are excluded from these requirements. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 64

These requirements should be met in **non-leased spaces** and for an additional point, also in **leased spaces**. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 65

The intent is to **enhance visual comfort** and minimize flicker effects for electric light. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 66

It refers to luminaires that meet specific standards for flicker testing, indicating reduced flicker for occupant comfort. | Created with Chat-GPT ## Footnote *This information comes from Page 123-124 of the WELL V2*

Answer 67

The intent is to provide individuals with access to **customizable lighting environments** that enhance well-being and productivity. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 68

Lighting environments that are customizable have been shown to improve **satisfaction levels**, positively impacting **mood** and **cognitive performance**. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 69

Lighting guidelines recommend **twice the light levels** for individuals over the age of 65 compared to those aged 25 to 65 due to age-related changes in light transmission. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 70

Solutions include developing a customizable environment that meets **visual** and **circadian requirements**, creating **distinct zones** for social interaction, and utilizing innovative lighting strategies. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 71

As humans age, the transmission of light through their lens is reduced due to **increased light absorption**, **smaller pupil size**, and **yellowing of the lenses**, affecting **visual acuity**. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 72

All regularly occupied spaces must contain **lighting zones** based on occupancy, such as **one zone per 650 ft^2** or **one per 10 occupants** to earn points. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 73

Each lighting zone must have at least **three lighting levels** or scenes, and allow changes in at least one of the following: **color**, **color temperature**, or **distribution of light**. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 74

Occupants can control their immediate lighting environment through **manual controls** in the same space as each lighting zone or via a **digital interface** on a computer or phone. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 75

Lighting for presentation or projection walls must be **separately controlled** to enhance occupant controllability. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 76

Option 1 focuses on the number of **lighting zones** required based on area or occupancy, while Option 2 emphasizes a **lighting control system** with adjustable settings and occupant controls. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 77

Occupants must be provided with **supplemental lighting** that increases light levels on task surfaces to at least **twice the recommended light levels** based on the reference used for Feature L02. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 78

Supplemental light fixtures must be positioned to create **minimal visual discomfort** for the occupant and should be installed at least **9 inches (23 cm)** from the front edge of the workstation or per **manufacturer's instructions**. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 79

Under Option 2, supplemental light fixtures must be available to occupants **upon request at no cost**, with requests fulfilled within **eight weeks**. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 80

At least one **supplemental light fixture** must be available for occupants to try out before making a decision. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*

Answer 81

The intent is to enhance the **visual comfort** and **task performance** of occupants by ensuring adequate lighting levels tailored to their needs. | Created with Chat-GPT ## Footnote *This information comes from Page 125-127 of the WELL V2*