Light Flashcards
What is daylight simulation requirement in regular occupied spaces?
Target illuminance 19 fc(200 lux) is achieved for >30% of individual unit area throughout 50% of daylit hours of the year.
What is the minimum light level of classrooms?
30 fc
What is the minimum light level of Dining, Lounge and Restroom?
10 fc
What is Option 2 of Part 1 of L01: Light Exposure?
a. At least 30% of the regularly occupied area is within a 20 ft(6 m) horizontal distance of envelope glazing in each floor and/or in each individual unit.
b. Common spaces have unassigned seating and can accommodate at least 15% of regular occupants at any given time. At least 70% of all seating in the spaces is within a 16 ft(5 m) horizontal distance of envelope glazing.
What are the lighting control system requirements for a lighting zone?
a. Lighting systems have at least 3 lighting levels or scenes that allow for changes in light levels and have the ability to change at least one of the following:
1. Color.
2. Color temperature.
3. Distribution of light by controlling different groups of lights or through preset scenes.
b. All regular occupants have control over their immediate lighting environment through at least one of the following:
1. Manual controls (e.g. switches or control panels) located in the same space as each lighting zone.
2. Digital interface available on a computer or phone.
c. Lighting for presentation or projection walls are separately controlled.
What are the requirements to manage glare from electric lighting of each in luminaire ?
Each luminaire to meet one of the following:
a. 100% of light is emitted above the horizontal plane.
b. Classified with Unified Glare Rating (UGR) of 16 or lower.
c. Luminance that does not exceed 6,000 cd/m at any angle between 45 and 90 degrees from nadir.
What are the considereations Professional needs to include in Designing Visual Balance?
a. Luminance ratios on vertical and horizontal adjacent zones.
b. Illuminance uniformity on horizontal task planes.
c. Changes in lighting characteristics, such as light levels, changes in color and distribution. d. Color temperature of lights used.
What does late afternoon/early night light exposure to our circadium rhythm?
Phase delay
What is daylight simulation requirement for common spaces that have unassigned seating for at least 15% of regular occupants at any given time?
Target illuminance 28 fc(300 lux) is achieved for >30% of individual unit area and average illuminance 9 fc(100 lux) is achieved for >95% of individual unit area throughout 50% of daylit hours of the year.
What is interior daylight exposure requirement for Facade Design?
Envelope glazing is no less than 15% of the regularly occupied floor area or individual unit. Visible light transmittance (VLT) of windows is greater than 40%. (1pt)
or
Envelope glazing is no less than 25% of the regularly occupied floor area or individual unit. Visible light transmittance (VLT) of windows is greater than 40%. (2pts)
What is a lighting zone?
One per 650 ft2 or one per 10 occupants (1pts)
One per 320 ft2 or one per 5 occupants (2pts)
What is the space consideration to manage glage from electric lighting?
. Unified Glare Rating (UGR) of 16 or lower (All space except indust)
. Unified Glare Rating (UGR) of 19 or lower (Industrial)
What are the requirements of predetermined light levels?
a. More than 50% of the occupants are under the age of 65.
b. At least 90% of the project area is comprised of Offices and classrooms: minimum 30 fc, Lobby, atrium and transition (including corridor and outdoor pathways): minimum 10 fc, Storage spaces: minimum 10 fc, Dining, Lounge and Restrooms: minimum 10 fc.
What are the requirements of the shading of All vertical transparent envelope glazing ?
Manual shading controllable by occupants at all times. Shades are regularly opened once a day for all days that the project is in use;
or
Shading is automated to prevent glare.
What is the minimum light level of Storage?
10 fc
What is the minimum light level of offices?
30 fc
Where supplemental light fixture is installed at least 9 in(23 cm) from the front edge of the workstation or other work surface (horizontal distance) or per manufacturer’s instructions.
at least 9 in(23 cm) from the front edge of the workstation or other work surface (horizontal distance)
or
per manufacturer’s instructions.
What are the optimizations of Light?
L03: Circadian Light Design
L04: Electric Light Glare Control
L05: Daylight Design Strategies
L06: Daylight Simulation
L07: Visual Balance
L08: Electric Light Quality
L09: Occupant Lighting Control
What metrics are used to determine the color rendering properties of a light source?
Color Rendering Index (CRI) and IES TM-30-15
What is interior daylight exposure requirement for Interior Layout?
70% of all workstations are within 25 ft(7.5 m) of transparent envelope glazing. Visible light transmittance (VLT) is greater than 40%. (1pt)
or
70% of all workstations are within 16 ft(5 m) of transparent envelope glazing. Visible light transmittance (VLT) is greater than 40%. (2pts)
What are the vertical envelope glazing requirements for Dwelling Units?
Vertical envelope glazing is no less than 15% of each dwelling unit. Visible light transmittance (VLT) is greater than 40% (1pt)
Vertical envelope glazing is no less than 25% of each dwelling unit. Visible light transmittance (VLT) is greater than 40%. (2pts)
How many optimizations are there for Light?
7 Optimizations
What is the minimum light level of corrdidor and outdoor pathway?
10 fc
What is glare?
Excessive brightness of the light-source, excessive brightness-contrasts and excessive quantity of light
What does late night/early morning light exposure to our circadium rhythm?
phase advance
What are the Visual Balance requirements for all regualrly occupied spaces?
a. Horizontal and vertical luminance contrast ratios for an ambient light system is no more than 10 between adjacent independently controlled zones.
b. Illuminance uniformity ratio of at least 0.4 or 1:2.5 (minimum light level: average light level) is achieved on any horizontal task plane within a space.
c. Automatic changes in lighting characteristics, such as light levels, changes in color and distribution take place over a period of 10 minutes.
d. The Correlated Color Temperature (CCT) in each room for similar fixtures is consistent (±200 K) at any point of time.
How many preconditions are there for Light?
2 Preconditions
How long Supplemental light fixtures requests are fullfilled?
Within 8 weeks at no cost.
What is Option 3 of Part 1 of L01: Light Exposure?
a. The envelope glazing area is no less than 7% of the floor area for each floor level or individual unit.
b. The floor plate is no more than 65 ft(20 m) between opposite walls that each have transparent envelope glazing, and there are no opaque obstructions higher than 3.2 ft(1 m) within a 20 ft(6 m) horizontal distance of the transparent envelope glazing.
What the circadian system controls?
Digestion, the release of certain hormones, body temperature and sleep
What are the requirements of the Enhanced Color Rendering Quality luminaires?
All luminaires to be:
a. CRI ≥90.
b. CRI ≥ 80 with R9 ≥ 50.
c. IES R ≥ 78, IES R ≥ 100, -1% ≤ IES R ≤ 15%.
What the preconditions of Light
L01: Light exposure
L02: Visual Light Design
What is Option 4 of Part 1 of L01: Light Exposure?
The project achieves at least one point in Feature L03: Circadian Lighting Design.
What is the intent of the Light Concept?
